This document summarizes a presentation on MySQL query optimization given by Peter Zaitsev of Percona. It discusses various techniques for optimizing queries such as avoiding unnecessary queries, caching results, simplifying queries, and optimizing queries through the use of indexes, limiting results, and addressing inefficient grouping and sorting. The presentation emphasizes the importance of understanding how the MySQL optimizer works and profiling queries to identify the most expensive queries to optimize.
Dokumen tersebut merupakan silabus mata kuliah Simulasi dan Permodelan yang mencakup tujuan pembelajaran simulasi dan permodelan, komponen penilaian, jadwal pertemuan, dan referensi bahan ajar.
The document discusses the key concepts of programming structure and design, including:
1. Programs are structured using sequential, branching, and looping instructions to control the flow of execution.
2. Large programs are divided into smaller subprograms to make the code more modular and readable.
3. Subprograms can be stored in separate files and reused across multiple programs, creating libraries.
4. Object-oriented programming improves on this by allowing "virtual" copies of subprograms rather than physical copies, ensuring only one master version exists.
JENI Slides-Intro1-Bab06-Struktur kontrolDimara Hakim
Dokumen tersebut membahas tentang struktur kontrol dalam pemrograman, termasuk struktur kontrol keputusan (if, else, switch) untuk memilih bagian kode yang dieksekusi, struktur kontrol pengulangan (while, do-while, for) untuk mengulang eksekusi kode, dan branching statement (break, continue, return) untuk mengatur alur program.
This document summarizes a presentation on MySQL query optimization given by Peter Zaitsev of Percona. It discusses various techniques for optimizing queries such as avoiding unnecessary queries, caching results, simplifying queries, and optimizing queries through the use of indexes, limiting results, and addressing inefficient grouping and sorting. The presentation emphasizes the importance of understanding how the MySQL optimizer works and profiling queries to identify the most expensive queries to optimize.
Dokumen tersebut merupakan silabus mata kuliah Simulasi dan Permodelan yang mencakup tujuan pembelajaran simulasi dan permodelan, komponen penilaian, jadwal pertemuan, dan referensi bahan ajar.
The document discusses the key concepts of programming structure and design, including:
1. Programs are structured using sequential, branching, and looping instructions to control the flow of execution.
2. Large programs are divided into smaller subprograms to make the code more modular and readable.
3. Subprograms can be stored in separate files and reused across multiple programs, creating libraries.
4. Object-oriented programming improves on this by allowing "virtual" copies of subprograms rather than physical copies, ensuring only one master version exists.
JENI Slides-Intro1-Bab06-Struktur kontrolDimara Hakim
Dokumen tersebut membahas tentang struktur kontrol dalam pemrograman, termasuk struktur kontrol keputusan (if, else, switch) untuk memilih bagian kode yang dieksekusi, struktur kontrol pengulangan (while, do-while, for) untuk mengulang eksekusi kode, dan branching statement (break, continue, return) untuk mengatur alur program.
Dokumen tersebut membahas tentang desain top-down dalam pemrograman terstruktur, yang dimulai dari memecah masalah utama menjadi submasalah dan sub-submasalah. Metode ini kemudian diimplementasikan dalam bentuk fungsi-fungsi dalam bahasa C, dengan satu fungsi untuk setiap submasalah. Fungsi-fungsi memiliki keuntungan seperti procedural abstraction dan reuse of code.
Makalah teori antrian (SISTEM ANTRIAN MM TAK HINGGA)STRosidah
Makalah ini membahas sistem antrian M/M/∞ di toko roti Swiss House. Makalah ini menjelaskan laju kedatangan dan pelayanan rata-rata pelanggan, ekspektasi jumlah pelanggan dan waktu antrian, serta menyimpulkan bahwa sistem antrian toko mengikuti model M/M/∞ sehingga tidak terdapat antrian.
Dokumen ini membahas tentang dasar-dasar pemodelan dan simulasi. Terdapat penjelasan tentang perbedaan antara verifikasi dan validasi, contoh model simulasi diskrit dan kontinyu, deterministik dan stokastik, serta statis dan dinamis. Juga dijelaskan tahapan pembuatan model dan contoh permasalahan yang dapat diselesaikan menggunakan metode simulasi.
A transaction is one or more SQL statements that must be completed as a whole. Transactions provide a way of grouping multiple operations into a single all-or-nothing action. There are three types of transactions: autocommit transactions, explicit transactions defined using transaction control statements, and implicit transactions enabled by setting the implicit transactions session setting. Transactions ensure data integrity and consistency using the ACID properties - atomicity, consistency, isolation, and durability.
PENDAHULUAN. SISTEM, MODEL, DAN SIMULASIDimara Hakim
Dokumen tersebut merupakan silabus mata kuliah Simulasi dan Permodelan yang mencakup tujuan pembelajaran simulasi dan permodelan, komponen penilaian, jadwal perkuliahan, dan referensi bahan ajar.
Dokumen tersebut merupakan laporan tugas besar permodelan sistem untuk usaha laundry bernama "Waroenk Laundry". Laporan tersebut membahas latar belakang, rumusan masalah, tujuan, profil perusahaan, analisis sistem stakeholder, hierarki sistem, dan influence diagram dari Waroenk Laundry untuk meminimalkan kerugian yang terjadi.
ANALISIS SISTEM ANTRIAN SERVICE MOBIL DI PT. TUNAS MOBILINDO PERKASA DENGAN M...Uofa_Unsada
Skripsi ini membahas analisis sistem antrian service mobil di PT. Tunas Mobilindo Perkasa dengan simulasi Arena. Perusahaan ini mengalami kendala antrian panjang khususnya di stasiun cuci mobil. Penelitian ini bertujuan mengidentifikasi penyebab antrian dan memberikan solusi dengan menganalisis data kedatangan dan pelayanan serta melakukan simulasi dengan Arena. Hasilnya menunjukkan penambahan petugas cuci dapat mengurangi waktu rata-
Tugas membuat desain basis data untuk beberapa studi kasus transaksi seperti perijinan, kependudukan, perbankan dan lainnya. Tugas meliputi normalisasi basis data, implementasi ke database server, dan optimasi berfokus pada query processing dengan menggunakan denormalisasi dan index. Presentasi dan laporan harus diserahkan sebelum UTS.
Disk-based storage is used in database servers to persist data because it can survive downtimes like power outages and has a lower cost per megabyte than RAM. However, disks are slower than RAM, so database servers use RAM as a data cache. When data is first requested, it is read from disk into RAM. Subsequent requests for the same data are faster because the data is already cached in RAM. When the RAM cache fills, older data is removed to make space for new data being loaded from disk into RAM.
Physical storage in databases involves tables, views, and data types. Tables store data in rows and columns and are made up of columns with assigned data types. Views allow you to display data from tables in different ways. Common data types include numeric, string, date/time, and binary types that determine what values a column can store.
Normalization is the process of organizing data in a database to minimize redundancy and dependency. There are several normal forms that were developed to classify how data should be structured, including first normal form (1NF), second normal form (2NF), and third normal form (3NF). 1NF requires each attribute to hold a single value and no repeating groups, 2NF adds that non-key attributes depend on the whole primary key, and 3NF extends this to eliminate transitive dependencies between non-key attributes. Normalization improves data integrity and efficiency of updates while denormalization improves query performance by duplicating some data.
Normalization is the process of organizing data in a database to minimize redundancy and dependency. It involves breaking tables into smaller, more manageable pieces called normal forms. There are five normal forms - first, second, third, fourth, and fifth normal form - that were developed to help classify data and reduce certain types of anomalies that can occur. Normalization improves data integrity by reducing duplicate data and making the database more efficient for updating records, while denormalization improves query performance by duplicating some data across tables.
Dokumen tersebut membahas tentang desain top-down dalam pemrograman terstruktur, yang dimulai dari memecah masalah utama menjadi submasalah dan sub-submasalah. Metode ini kemudian diimplementasikan dalam bentuk fungsi-fungsi dalam bahasa C, dengan satu fungsi untuk setiap submasalah. Fungsi-fungsi memiliki keuntungan seperti procedural abstraction dan reuse of code.
Makalah teori antrian (SISTEM ANTRIAN MM TAK HINGGA)STRosidah
Makalah ini membahas sistem antrian M/M/∞ di toko roti Swiss House. Makalah ini menjelaskan laju kedatangan dan pelayanan rata-rata pelanggan, ekspektasi jumlah pelanggan dan waktu antrian, serta menyimpulkan bahwa sistem antrian toko mengikuti model M/M/∞ sehingga tidak terdapat antrian.
Dokumen ini membahas tentang dasar-dasar pemodelan dan simulasi. Terdapat penjelasan tentang perbedaan antara verifikasi dan validasi, contoh model simulasi diskrit dan kontinyu, deterministik dan stokastik, serta statis dan dinamis. Juga dijelaskan tahapan pembuatan model dan contoh permasalahan yang dapat diselesaikan menggunakan metode simulasi.
A transaction is one or more SQL statements that must be completed as a whole. Transactions provide a way of grouping multiple operations into a single all-or-nothing action. There are three types of transactions: autocommit transactions, explicit transactions defined using transaction control statements, and implicit transactions enabled by setting the implicit transactions session setting. Transactions ensure data integrity and consistency using the ACID properties - atomicity, consistency, isolation, and durability.
PENDAHULUAN. SISTEM, MODEL, DAN SIMULASIDimara Hakim
Dokumen tersebut merupakan silabus mata kuliah Simulasi dan Permodelan yang mencakup tujuan pembelajaran simulasi dan permodelan, komponen penilaian, jadwal perkuliahan, dan referensi bahan ajar.
Dokumen tersebut merupakan laporan tugas besar permodelan sistem untuk usaha laundry bernama "Waroenk Laundry". Laporan tersebut membahas latar belakang, rumusan masalah, tujuan, profil perusahaan, analisis sistem stakeholder, hierarki sistem, dan influence diagram dari Waroenk Laundry untuk meminimalkan kerugian yang terjadi.
ANALISIS SISTEM ANTRIAN SERVICE MOBIL DI PT. TUNAS MOBILINDO PERKASA DENGAN M...Uofa_Unsada
Skripsi ini membahas analisis sistem antrian service mobil di PT. Tunas Mobilindo Perkasa dengan simulasi Arena. Perusahaan ini mengalami kendala antrian panjang khususnya di stasiun cuci mobil. Penelitian ini bertujuan mengidentifikasi penyebab antrian dan memberikan solusi dengan menganalisis data kedatangan dan pelayanan serta melakukan simulasi dengan Arena. Hasilnya menunjukkan penambahan petugas cuci dapat mengurangi waktu rata-
Tugas membuat desain basis data untuk beberapa studi kasus transaksi seperti perijinan, kependudukan, perbankan dan lainnya. Tugas meliputi normalisasi basis data, implementasi ke database server, dan optimasi berfokus pada query processing dengan menggunakan denormalisasi dan index. Presentasi dan laporan harus diserahkan sebelum UTS.
Disk-based storage is used in database servers to persist data because it can survive downtimes like power outages and has a lower cost per megabyte than RAM. However, disks are slower than RAM, so database servers use RAM as a data cache. When data is first requested, it is read from disk into RAM. Subsequent requests for the same data are faster because the data is already cached in RAM. When the RAM cache fills, older data is removed to make space for new data being loaded from disk into RAM.
Physical storage in databases involves tables, views, and data types. Tables store data in rows and columns and are made up of columns with assigned data types. Views allow you to display data from tables in different ways. Common data types include numeric, string, date/time, and binary types that determine what values a column can store.
Normalization is the process of organizing data in a database to minimize redundancy and dependency. There are several normal forms that were developed to classify how data should be structured, including first normal form (1NF), second normal form (2NF), and third normal form (3NF). 1NF requires each attribute to hold a single value and no repeating groups, 2NF adds that non-key attributes depend on the whole primary key, and 3NF extends this to eliminate transitive dependencies between non-key attributes. Normalization improves data integrity and efficiency of updates while denormalization improves query performance by duplicating some data.
Normalization is the process of organizing data in a database to minimize redundancy and dependency. It involves breaking tables into smaller, more manageable pieces called normal forms. There are five normal forms - first, second, third, fourth, and fifth normal form - that were developed to help classify data and reduce certain types of anomalies that can occur. Normalization improves data integrity by reducing duplicate data and making the database more efficient for updating records, while denormalization improves query performance by duplicating some data across tables.
1. The document discusses different data access technologies and components for connecting to databases from client-side applications including OLE DB, ODBC, ADO, ADO.NET, and database-specific providers.
2. It provides considerations for using earlier technologies like ODBC and OLE DB to access data and guidelines for implementing data binding including connection pooling and closing connections properly.
3. The document demonstrates connecting SQL Server to other data stores using different technologies and components.
The document discusses database management systems (DBMS). It explains that a DBMS is software that stores and manages databases to provide benefits like data independence, efficient access, integrity and security. It also discusses key DBMS concepts like data models, schemas, transactions, concurrency control and ensuring atomicity through logging. DB application development and database administration are important roles supported by a DBMS.
Bab 1b The Structure Of A Computer ProgramDimara Hakim
This document discusses the structure of computer programs and identifies three key types of instructions: sequential instructions which run code in order, branching instructions which allow for conditional changes in flow, and looping instructions which repeat sections of code. Programs are built using these three instruction types to implement logic and control flow.
The document discusses several prescriptive process models for software engineering projects, including the waterfall model, incremental model, RAD (rapid application development) model, evolutionary models like prototyping and the spiral model, and concurrent engineering. It notes both benefits and limitations of each approach, and questions whether prescriptive models can accommodate the need for change in software projects.
Dokumen ini membahas proses rekayasa perangkat lunak yang meliputi aktivitas-aktivitas seperti perencanaan, desain, konstruksi, pengujian, dan manajemen proyek. Proses ini bertujuan untuk menghasilkan perangkat lunak berkualitas dengan waktu penyelesaian yang tepat melalui pengurangan pekerjaan ulang.