The document discusses temporal data warehousing and databases. A temporal data warehouse stores historical information from multiple sources and allows querying past data to identify trends. It contains atomic and summarized data relevant to specific time periods. Temporal data has applications in domains like banking, retail, and healthcare. A temporal database supports handling data involving time through features like valid time and transaction time. It stores facts that were true at different points in time rather than just the current time.
Temporal Database is the most convenient form to represent time element associated with data. Temporal validity support a unique feature of temporal database lets you associate one or more valid time dimensions with a table and have data be visible depending on its time-based validity, as determined by the start and end dates or time stamps of the period for which a given record is considered to be a valid record. This study focuses on checking and verification of temporal data using valid time dimension of temporal database. This study covers the steps for adding a valid time dimension on a table, and various methods for querying the table and retrieving records based on a specified valid time value or range with
help of Oracle 12c.
BI-TEMPORAL IMPLEMENTATION IN RELATIONAL DATABASE MANAGEMENT SYSTEMS: MS SQ...lyn kurian
Traditional database management systems (DBMS) are the computation
storage and reservoir of large amounts of information. The data accumulated by these
database systems is the information valid at present time, valid now. It is the data that
is true at the present moment. Past data is the information that was kept in the
database at an earlier time, data that is hold to be existed in the past, were valid at
some point before now. Future data is the information supposed to be valid at a future
time instance, data that will be true in the near future, valid at some point after now.
The commercial DBMS of today used by organizations and individuals, such as MS
SQL Server, Oracle, DB2, Sybase, Postgres etc., do not provide models to support and
process (retrieving, modifying, inserting and removing) past and future data.
The implementation of bi-temporal modelling in Microsoft SQL Server is important
to know how relational database management system handles data the bi-temporal
property. In bi-temporal database, data saved is never deleted and additional values
are always appended. Therefore, the paper explores one of the way we can build bitemporal handling of data. The paper aims to build the core concepts of bi-temporal
data storage and querying techniques used in bi-temporal relational DBMS i.e., from
data structures to normalized storage, and to extraction or slicing of data.
The unlimited growth of data results relational data to become complicated in terms
of management and storage of data. Thus, the developers working in various
commercial and industrial applications should know how bi-temporal concepts apply to relational databases, especially due to their increased flexibility in the bi-temporal
storage as well as in analyzing data. Thereby, the paper demonstrates how bi-temporal
data structures and their operations are applied in Relational Database Management
System
Temporal Database is the most convenient form to represent time element associated with data. Temporal validity support a unique feature of temporal database lets you associate one or more valid time dimensions with a table and have data be visible depending on its time-based validity, as determined by the start and end dates or time stamps of the period for which a given record is considered to be a valid record. This study focuses on checking and verification of temporal data using valid time dimension of temporal database. This study covers the steps for adding a valid time dimension on a table, and various methods for querying the table and retrieving records based on a specified valid time value or range with
help of Oracle 12c.
BI-TEMPORAL IMPLEMENTATION IN RELATIONAL DATABASE MANAGEMENT SYSTEMS: MS SQ...lyn kurian
Traditional database management systems (DBMS) are the computation
storage and reservoir of large amounts of information. The data accumulated by these
database systems is the information valid at present time, valid now. It is the data that
is true at the present moment. Past data is the information that was kept in the
database at an earlier time, data that is hold to be existed in the past, were valid at
some point before now. Future data is the information supposed to be valid at a future
time instance, data that will be true in the near future, valid at some point after now.
The commercial DBMS of today used by organizations and individuals, such as MS
SQL Server, Oracle, DB2, Sybase, Postgres etc., do not provide models to support and
process (retrieving, modifying, inserting and removing) past and future data.
The implementation of bi-temporal modelling in Microsoft SQL Server is important
to know how relational database management system handles data the bi-temporal
property. In bi-temporal database, data saved is never deleted and additional values
are always appended. Therefore, the paper explores one of the way we can build bitemporal handling of data. The paper aims to build the core concepts of bi-temporal
data storage and querying techniques used in bi-temporal relational DBMS i.e., from
data structures to normalized storage, and to extraction or slicing of data.
The unlimited growth of data results relational data to become complicated in terms
of management and storage of data. Thus, the developers working in various
commercial and industrial applications should know how bi-temporal concepts apply to relational databases, especially due to their increased flexibility in the bi-temporal
storage as well as in analyzing data. Thereby, the paper demonstrates how bi-temporal
data structures and their operations are applied in Relational Database Management
System
The growth of big-data sectors such as the Internet of Things (IoT) generates enormous volumes of data. As IoT devices generate a vast volume of time-series data, the Time Series Database (TSDB) popularity has grown alongside the rise of IoT. Time series databases are developed to manage and analyze huge amounts of time series data. However, it is not easy to choose the best one from them. The most popular benchmarks compare the performance of different databases to each other but use random or synthetic data that applies to only one domain. As a result, these benchmarks may not always accurately represent real-world performance. It is required to comprehensively compare the performance of time series databases with real datasets. The experiment shows significant performance differences for data injection time and query execution time when comparing real and synthetic datasets. The results are reported and analyzed.
Converting UML Class Diagrams into Temporal Object Relational DataBase IJECEIAES
Number of active researchers and experts, are engaged to develop and implement new mechanism and features in time varying database management system (TVDBMS), to respond to the recommendation of modern business environment.Time-varying data management has been much taken into consideration with either the attribute or tuple time stamping schema. Our main approach here is to try to offer a better solution to all mentioned limitations of existing works, in order to provide the nonprocedural data definitions, queries of temporal data as complete as possible technical conversion ,that allow to easily realize and share all conceptual details of the UML class specifications, from conception and design point of view. This paper contributes to represent a logical design schema by UML class diagrams, which are handled by stereotypes to express a temporal object relational database with attribute timestamping.
Temporal Web Dynamics and Implications for Information RetrievalNattiya Kanhabua
In this talk, we will give a survey of current approaches to searching the
temporal web. In such a web collection, the contents are created and/or
edited over time, and examples are web archives, news archives, blogs,
micro-blogs, personal emails and enterprise documents. Unfortunately,
traditional IR approaches based on term-matching only can give
unsatisfactory results when searching the temporal web. The reason for this
is multifold: 1) the collection is strongly time-dependent, i.e., with
multiple versions of documents, 2) the contents of documents are about
events happened at particular time periods, 3) the meanings of semantic
annotations can change over time, and 4) a query representing an information
need can be time-sensitive, so-called a temporal query.
Several major challenges in searching the temporal web will be discussed,
namely, 1) How to understand temporal search intent represented by
time-sensitive queries? 2) How to handle the temporal dynamics of queries
and documents? and 3) How to explicitly model temporal information in retrieval and ranking models? To this end, we will present current approaches to the addressed problems as well as outline the directions for future research.
A bitemporal nested query language, BTN-SQL, is
proposed in this paper. BTN-SQL attempts to fill some gaps
present in currently available SQL standards. BTN-SQL
extends the well-known SQL syntax into two directions, the
user-friendliness support of nested relations and the effective
support of bitemporal data. The schema of a bitemporal nested
database is difficult to be understood since it is complicated
by nature; therefore, an extended approach of the Entity-
Relationship model, the BTN-ER model, is also proposed for
modelling complex bitemporal nested data.
The growth of big-data sectors such as the Internet of Things (IoT) generates enormous volumes of data. As IoT devices generate a vast volume of time-series data, the Time Series Database (TSDB) popularity has grown alongside the rise of IoT. Time series databases are developed to manage and analyze huge amounts of time series data. However, it is not easy to choose the best one from them. The most popular benchmarks compare the performance of different databases to each other but use random or synthetic data that applies to only one domain. As a result, these benchmarks may not always accurately represent real-world performance. It is required to comprehensively compare the performance of time series databases with real datasets. The experiment shows significant performance differences for data injection time and query execution time when comparing real and synthetic datasets. The results are reported and analyzed.
Converting UML Class Diagrams into Temporal Object Relational DataBase IJECEIAES
Number of active researchers and experts, are engaged to develop and implement new mechanism and features in time varying database management system (TVDBMS), to respond to the recommendation of modern business environment.Time-varying data management has been much taken into consideration with either the attribute or tuple time stamping schema. Our main approach here is to try to offer a better solution to all mentioned limitations of existing works, in order to provide the nonprocedural data definitions, queries of temporal data as complete as possible technical conversion ,that allow to easily realize and share all conceptual details of the UML class specifications, from conception and design point of view. This paper contributes to represent a logical design schema by UML class diagrams, which are handled by stereotypes to express a temporal object relational database with attribute timestamping.
Temporal Web Dynamics and Implications for Information RetrievalNattiya Kanhabua
In this talk, we will give a survey of current approaches to searching the
temporal web. In such a web collection, the contents are created and/or
edited over time, and examples are web archives, news archives, blogs,
micro-blogs, personal emails and enterprise documents. Unfortunately,
traditional IR approaches based on term-matching only can give
unsatisfactory results when searching the temporal web. The reason for this
is multifold: 1) the collection is strongly time-dependent, i.e., with
multiple versions of documents, 2) the contents of documents are about
events happened at particular time periods, 3) the meanings of semantic
annotations can change over time, and 4) a query representing an information
need can be time-sensitive, so-called a temporal query.
Several major challenges in searching the temporal web will be discussed,
namely, 1) How to understand temporal search intent represented by
time-sensitive queries? 2) How to handle the temporal dynamics of queries
and documents? and 3) How to explicitly model temporal information in retrieval and ranking models? To this end, we will present current approaches to the addressed problems as well as outline the directions for future research.
A bitemporal nested query language, BTN-SQL, is
proposed in this paper. BTN-SQL attempts to fill some gaps
present in currently available SQL standards. BTN-SQL
extends the well-known SQL syntax into two directions, the
user-friendliness support of nested relations and the effective
support of bitemporal data. The schema of a bitemporal nested
database is difficult to be understood since it is complicated
by nature; therefore, an extended approach of the Entity-
Relationship model, the BTN-ER model, is also proposed for
modelling complex bitemporal nested data.
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Round table discussion of vector databases, unstructured data, ai, big data, real-time, robots and Milvus.
A lively discussion with NJ Gen AI Meetup Lead, Prasad and Procure.FYI's Co-Found
Adjusting OpenMP PageRank : SHORT REPORT / NOTESSubhajit Sahu
For massive graphs that fit in RAM, but not in GPU memory, it is possible to take
advantage of a shared memory system with multiple CPUs, each with multiple cores, to
accelerate pagerank computation. If the NUMA architecture of the system is properly taken
into account with good vertex partitioning, the speedup can be significant. To take steps in
this direction, experiments are conducted to implement pagerank in OpenMP using two
different approaches, uniform and hybrid. The uniform approach runs all primitives required
for pagerank in OpenMP mode (with multiple threads). On the other hand, the hybrid
approach runs certain primitives in sequential mode (i.e., sumAt, multiply).
Global Situational Awareness of A.I. and where its headedvikram sood
You can see the future first in San Francisco.
Over the past year, the talk of the town has shifted from $10 billion compute clusters to $100 billion clusters to trillion-dollar clusters. Every six months another zero is added to the boardroom plans. Behind the scenes, there’s a fierce scramble to secure every power contract still available for the rest of the decade, every voltage transformer that can possibly be procured. American big business is gearing up to pour trillions of dollars into a long-unseen mobilization of American industrial might. By the end of the decade, American electricity production will have grown tens of percent; from the shale fields of Pennsylvania to the solar farms of Nevada, hundreds of millions of GPUs will hum.
The AGI race has begun. We are building machines that can think and reason. By 2025/26, these machines will outpace college graduates. By the end of the decade, they will be smarter than you or I; we will have superintelligence, in the true sense of the word. Along the way, national security forces not seen in half a century will be un-leashed, and before long, The Project will be on. If we’re lucky, we’ll be in an all-out race with the CCP; if we’re unlucky, an all-out war.
Everyone is now talking about AI, but few have the faintest glimmer of what is about to hit them. Nvidia analysts still think 2024 might be close to the peak. Mainstream pundits are stuck on the wilful blindness of “it’s just predicting the next word”. They see only hype and business-as-usual; at most they entertain another internet-scale technological change.
Before long, the world will wake up. But right now, there are perhaps a few hundred people, most of them in San Francisco and the AI labs, that have situational awareness. Through whatever peculiar forces of fate, I have found myself amongst them. A few years ago, these people were derided as crazy—but they trusted the trendlines, which allowed them to correctly predict the AI advances of the past few years. Whether these people are also right about the next few years remains to be seen. But these are very smart people—the smartest people I have ever met—and they are the ones building this technology. Perhaps they will be an odd footnote in history, or perhaps they will go down in history like Szilard and Oppenheimer and Teller. If they are seeing the future even close to correctly, we are in for a wild ride.
Let me tell you what we see.
Enhanced Enterprise Intelligence with your personal AI Data Copilot.pdfGetInData
Recently we have observed the rise of open-source Large Language Models (LLMs) that are community-driven or developed by the AI market leaders, such as Meta (Llama3), Databricks (DBRX) and Snowflake (Arctic). On the other hand, there is a growth in interest in specialized, carefully fine-tuned yet relatively small models that can efficiently assist programmers in day-to-day tasks. Finally, Retrieval-Augmented Generation (RAG) architectures have gained a lot of traction as the preferred approach for LLMs context and prompt augmentation for building conversational SQL data copilots, code copilots and chatbots.
In this presentation, we will show how we built upon these three concepts a robust Data Copilot that can help to democratize access to company data assets and boost performance of everyone working with data platforms.
Why do we need yet another (open-source ) Copilot?
How can we build one?
Architecture and evaluation
Unleashing the Power of Data_ Choosing a Trusted Analytics Platform.pdfEnterprise Wired
In this guide, we'll explore the key considerations and features to look for when choosing a Trusted analytics platform that meets your organization's needs and delivers actionable intelligence you can trust.
ViewShift: Hassle-free Dynamic Policy Enforcement for Every Data LakeWalaa Eldin Moustafa
Dynamic policy enforcement is becoming an increasingly important topic in today’s world where data privacy and compliance is a top priority for companies, individuals, and regulators alike. In these slides, we discuss how LinkedIn implements a powerful dynamic policy enforcement engine, called ViewShift, and integrates it within its data lake. We show the query engine architecture and how catalog implementations can automatically route table resolutions to compliance-enforcing SQL views. Such views have a set of very interesting properties: (1) They are auto-generated from declarative data annotations. (2) They respect user-level consent and preferences (3) They are context-aware, encoding a different set of transformations for different use cases (4) They are portable; while the SQL logic is only implemented in one SQL dialect, it is accessible in all engines.
#SQL #Views #Privacy #Compliance #DataLake
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
The Building Blocks of QuestDB, a Time Series Databasejavier ramirez
Talk Delivered at Valencia Codes Meetup 2024-06.
Traditionally, databases have treated timestamps just as another data type. However, when performing real-time analytics, timestamps should be first class citizens and we need rich time semantics to get the most out of our data. We also need to deal with ever growing datasets while keeping performant, which is as fun as it sounds.
It is no wonder time-series databases are now more popular than ever before. Join me in this session to learn about the internal architecture and building blocks of QuestDB, an open source time-series database designed for speed. We will also review a history of some of the changes we have gone over the past two years to deal with late and unordered data, non-blocking writes, read-replicas, or faster batch ingestion.
2. Temporal Databases & Data Warehousing
• Temporal databases and data warehousing are two separate areas
which are strongly related:
• data warehouses are the commercial products that require
temporal database technology.
• Naturally, most other database products are amenable to temporal
database technology, too.
• Regarding the market perspectives, however, one has to assume
that it will be mainly data warehouses that adopt the techniques
that have been and that will be developed by temporal database
researchers.
3. Temporal Data Warehouse
• A temporal data warehouse is a repository of historical
information, originating from multiple, autonomous, (sometimes)
heterogeneous and non-temporal sources.
• It is available for queries and analysis (such as data mining) not
only to users interested in current information but also to those
interested in researching past information to identify relevant
trends.
• A collection of integrated, subject-oriented databases designed to
support the DSS function, where each unit of data is relevant to
some moment in time. The data warehouse contains atomic data
and lightly summarized data.
4. Applications of Temporal Data Warehouse
• Temporal data has important applications in many domains
(Jensen 1999; Jestes 2012).
• Most of those domains applications can benefit from a temporal
data warehouse (Thomas and Datta 2001; and Yang and Widom
1998) such as banking, retail sales, financial services, medical
records, inventory management, telecommunications, and
reservation systems.
• In the case of a bank account, an account holder’s balance will
change after each transaction.
• The amount or descriptions of a financial document will change
for business purposes.
• Such data is often valuable to different stakeholders and should
be stored in both current state and all previously current states.
5. Temporal Databases
• A temporal database is a database with built-in support for
handling data involving time, being related to Slowly changing
dimension concept, for example a temporal data model and a
temporal version of Structured Query Language (SQL).
• More specifically the temporal aspects usually include valid time
and transaction time. These attributes can be combined to form
bitemporal data.
6. Definitions and Meanings
Valid Time is the time period during which a fact is true with respect to
the real world.
Transaction time is the time period during which a fact stored in the
database is considered to be true.
Bitemporal Data combines both Valid and Transaction Time.
• It is possible to have timelines other than Valid Time and Transaction
Time, such as Decision Time, in the database. In that case the database
is called a multitemporal database as opposed to a bitemporal database.
• However, this approach introduces additional complexities such as
dealing with the validity of (foreign) keys.
• Temporal databases are in contrast to current databases, which store
only facts which are believed to be true at the current time.
7. Synchronization and relationships
• Temporal relations define temporal dependencies between the objects.
• For e.g, the temporal relations are the relation between a video and audio
object that are recorded during a concert. if these objects are presented,
the temporal relation during the presentations of the two media objects
must correspond to the temporal relation at the recording moment. These
time relations one must understand as synchronization in systems.
• Synchronization relationships specify how two temporal extents relate to
each other.
• They are essential in temporal applications, since they allow one to
determine, whether two events occur simultaneously or whether one
precedes the other.
8. Synchronization and Relationships
• The synchronization relationships for the temporal data correspond to the
topological relationships for the spatial data. They are defined in a similar
way, on the basis of the concepts of:
1. Boundary: The boundary is defined for the different temporal data types as
follows. An instant has many empty boundaries. The boundary of an interval
consists of its start and end instants. For e.g, The boundary of
CompileTime Value is defined by union of boundaries of its components that
do not intersect with other components.
2. Interior: The interior of temporal Value is composed of all its instants that
do not belong to the boundary.
3. Exterior: The exterior of a temporal value is composed of all the instants of
the underlying time frame that do not belong to the temporal value.
9. Icons for Synchronization Relationships
• The commonly used synchronization relationships are shown in the table:
1. Meets: Two temporal values meet if they intersect in an instant but their
interior do not. Note that two temporal values may intersect in an instant but
do not meet.
2. Overlaps: Two temporal values if their interiors intersect and their intersection
is not equal to either of them.
3. Contains/Inside: These are the symmetric predicates- a contains b if and only if
b inside a. A temporal value contains another one if the interior of the former
contains all instants of the second.
4. Covers/Converted By: These are the symmetric predicates –a covers b if and
only if b covered By a. A temporal value covers another one if the former
includes all instants of the latter.
10. Icons for Synchronization Relationships
• Disjoint/Intersects: These are inverse temporal predicates –when one applies, the
other does not. Two temporal values are disjoint if they do not share any instant.
• Equals: Two temporal values are equal if every instant of the first value belongs
also to the second and conversely.
• Starts/Finishes: A temporal value starts another if the first instants of the two
values are equal. Similarly, a temporal value finishes another if the last instants of
the two values are equal.
• Precedes/Succeeds: A temporal value precedes another if the last instant of the
former is before the first instant of the second. Similarly, a temporal value
succeeds another if the first instant of the former is later than the instant of the
second.
12. Temporality Data Types
• Use temporal data types to store date, time, and time-interval
information. Although you can store this data in character strings,
it is better to use temporal types for consistency and validation.
• Temporality Data Types.docx
14. Temporality Types
Two different temporality types are usually considered:
Valid Time (VT),Transaction time (TT) that allow representing, respectively, when the data is true in the modeled
reality and when it is current in the database. If both temporality types are used, they define bitemporal time
(BT). In addition, the LifeSpan (LS) is used to record changes in time for an object as a whole.
These temporality types are used for representing either events, i.e., something that happens at a particular time
point, or states, i.e., something that has extent over time. For the former an instant is used, i.e., a timepoint on
an underlying time axis; the specific value of an instant is called timestamp. An instant may have assigned a
particular value now indicating current time. An instant is defined according to a non-decomposable time unit
called granule, and its size is called granularity. States are represented by an interval or period.
15. Temporal Support for Levels
• Changes in a level can occur either for a member as a whole(for example,
inserting or deleting a product in the catalog of company) or for attribute values(
for example, changing the size of a product).
• Representing these changes in a temporal data warehouse is important for analysis
purposes to discover how the exclusion of some products or changes to the size of
a product influence sales.
• In a MultiDim model, a level may have temporal support independently of the fact
that it has temporal attributes.
16. Temporal Support for Levels
LS Product
Product number
Name
Description
Size
Distributor
LS Product
VT
Product number
Name
Description
Size
Distributor
Product
VT
Product number
Name
Description
Size
Distributor
(a) Temporal Level (b) Temporal Level
with Temporal
attributes
(c) Non Temporal
level with temporal
attributes
17. Temporal Support Levels
• There are two types of temporality Support:
1) Lifespan Support is the used to keep changes of the levels members ; this is
represented by putting the LS symbol next to the level’s name. Lifespan can be
combined with the transaction time and loading times which indicate,
respectively, when the level member is current in a source system and in a
temporal data warehouse.
2) Temporal Support to attributes allows keeping changes in their values and time
when they have occurred. This is represented by including the symbol of
corresponding temporality type next to the attribute name in Figure a.
Figure b shows an example of a product level that includes temporal attributes size
and distributor.
18. Temporal Hierarchies
Hierarchies in MultiDim model contain several related levels. For two related levels in hierarchy, the levels, the
relationship between them or both may have temporal support.