This document discusses different types of joins in SQL, including inner joins, outer joins, self joins, and joining multiple tables. It provides examples of joining two tables on a common column using various SQL syntax like WHERE, ON, NATURAL JOIN, and USING. Specific types of joins covered include equijoins to retrieve matching records, outer joins to also return non-matching records, and self joins to join a table to itself.
Types Of Join In Sql Server - Join With Example In Sql Serverprogrammings guru
Do you know How many types of Joins in SQL. In this ppt presentation we are discussion about types of joins in sql server eg: INNER JOIN , SELF JOIN ,OUTER JOIN ,Right outer Join,Left outer Join,Full Outer Join,CROSS JOIN .
Types Of Join In Sql Server - Join With Example In Sql Serverprogrammings guru
Do you know How many types of Joins in SQL. In this ppt presentation we are discussion about types of joins in sql server eg: INNER JOIN , SELF JOIN ,OUTER JOIN ,Right outer Join,Left outer Join,Full Outer Join,CROSS JOIN .
Displaying Data from Multiple Tables - Oracle Data BaseSalman Memon
After completing this lesson, you should be able to
do the following:
Write SELECT statements to access data from more than one table using equality and nonequality joins
View data that generally does not meet a join condition by using outer joins
Join a table to itself by using a self join
http://phpexecutor.com
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. Objectives After completing this lesson, you should be able to do the following: " Write SELECT statements to access data from more than one table using equality and nonequality joins " View data that generally does not meet a join condition by using outer joins " Join a table to itself by using a self join http://ecomputernotes.com
3. Obtaining Data from Multiple Tables EMPLOYEES DEPARTMENTS « « http://ecomputernotes.com
4. Cartesian Products "A Cartesian product is formed when: A join condition is omitted A join condition is invalid All rows in the first table are joined to all rows in the second table "T o avoid a Cartesian product, always include a valid join condition in a WHERE clause. http://ecomputernotes.com
6. Types of Joins Oracle Proprietary SQL: 1999 Compliant Joins: Joins (8 ii and prior): " Equijoin " Cross joins " " Non-equijoin Natural joins " " Outer join Using clause " " Self join Full or two sided outer joins " Arbitrary join conditions for outer joins http://ecomputernotes.com
7. Joining Tables Using Oracle Syntax Use a join to query data from more than one table. SELECT table1.column, table2.column FRO M table1, table2 WHERE table1.column1 == table2.column2; " Write the join condition in the WHERE clause. " Prefix the column name with the table name when the same column name appears in more than one table. http://ecomputernotes.com
8. What is an Equijoin? EMPLOYEES DEPARTMENTS « « Foreign key Primary key http://ecomputernotes.com
9. Retrieving Records with Equijoins SELECT employees.employee_id, employees.last_name, employees.department_id, departments.department_id, departments.location_id FROM employees, departments WHERE employees.department_id = departments.department_id; « http://ecomputernotes.com
11. Qualifying Ambiguous Column Names " Use table prefixes to qualify column names that are in multiple tables. " Improve performance by using table prefixes. " Distinguish columns that have identical names but reside in different tables by using column aliases. http://ecomputernotes.com
12. Using Table Aliases " Simplify queries by using table aliases. " Improve performance by using table prefixes. SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e , departments d WHERE e.department_id = d.department_id; http://ecomputernotes.com
13. Joining More than Two Tables MPLOYEE DEPARTMENTS LOCATIONS "T o join n t ables together, you need a minimum of n-1 join conditions. For example, to join three tables, a minimum of two joins is required. http://ecomputernotes.com
14. Non-Equijoins EMPLOYEES JOB_GRADES Salary in the EMPLOYEES table must be between « lowest salary and highest salary in the JOB_GRADES table. http://ecomputernotes.com
15. Retrieving Records with Non-Equijoins SELECT e.last_name, e.salary, j.grade_level FROM employees e, job_grades j WHERE e.salary BETWEEN j.lowest_sal AND j.highest_sal; « http://ecomputernotes.com
16. Outer Joins DEPARTMENTS EMPLOYEES « There are no employees in department 190. http://ecomputernotes.com
17. Outer Joins Syntax " You use an outer join to also see rows that do not meet the join condition. " The Outer join operator is the plus sign (+). SELECT table1.column, table2.column FRO M table1, table2 WHERE table1.column(+)(+) == table2.column; SELECT table1.column, table2.column FRO M table1, table2 WHERE table1.column == table2.column(+);(+); http://ecomputernotes.com
18. Using Outer Joins SELECT e.last_name, e.department_id, d.department_name FROM employees e, departments d WHERE e.department_id(+) = d.department_id ; « http://ecomputernotes.com
19. Self Joins EMPLOYEES (WORKER) EMPLOYEES (MANAGER) « « MANAGER_ID in the WORKER table is equal to EMPLOYEE_ID in the MANAGER table. http://ecomputernotes.com
20. Joining a Table to Itself SELECT worker.last_name || ' works for ' || manager.last_name FROM employees worker, employees manager WHERE worker.manager_id = manager.employee_id ; « http://ecomputernotes.com
21. Practice 4, Part One: Overview This practice covers writing queries to join tables together using Oracle syntax. http://ecomputernotes.com
22. Joining Tables Using SQL: 1999 Syntax Use a join to query data from more than one table. SELECT table1.column, table2.column FRO M table1 [CROSS JOIN table2 ] |] | [NATURAL JOIN table2 ] |] | )] | [JOIN table2 USING ( column_name )] | [JOIN table2 )] | ON( table1.column_name == table2.column_name )] | [LEFT|RIGHT|FULL OUTER JOIN table2 )]; ON ( table1.column_name == table2.column_name )];
23. Creating Cross Joins " The CROSS JOIN clause produces the cross- product of two tables. "T his is the same as a Cartesian product between the two tables. SELECT last_name, department_name FROM employees CROSS JOIN departments ; «
24. Creating Natural Joins "T he N ATURAL JOIN c lause is based on all columns in the two tables that have the same name. " It selects rows from the two tables that have equal values in all matched columns. "I f the columns having the same names have different data types, an error is returned.
25. Retrieving Records with Natural Joins SELECT department_id, department_name, location_id, city FROM departments NATURAL JOIN locations ;
26. Creating Joins with the USING Clause "I f several columns have the same names but the data types do not match, the NATURAL JOIN clause can be modified with the USING clause to specify the columns that should be used for an equijoin. "U se the U SING c lause to match only one column when more than one column matches. "D o not use a table name or alias in the referenced columns. " The NATURAL JOIN and USING clauses are mutually exclusive.
27. Retrieving Records with the USING Clause SELECT e.employee_id, e.last_name, d.location_id FROM employees e JOIN departments d USING (department_id) ; «
28. Creating Joins with the ON Clause "T he join condition for the natural join is basically an equijoin of all columns with the same name. "T o specify arbitrary conditions or specify columns to join, the ON clause is used. "T he join condition is separated from other s earch conditions. " The ON clause makes code easy to understand.
29. Retrieving Records with the ON Clause SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON(e.department_id = d.department_id); «
30. Creating Three-Way Joins with the ON Clause SELECT employee_id, city, department_name FROM employees e JOIN departments d ON d.department_id = e.department_id JOIN locations l ON d.location_id = l.location_id; «
31. INNER Versus OUTER Joins "I n SQL: 1999, the join of two tables returning only matched rows is an inner join. "A join between two tables that returns the results of the inner join as well as unmatched rows left (or right) tables is a left (or right) outer join. "A join between two tables that returns the results of an inner join as well as the results of a left and right join is a full outer join.
32. LEFT OUTER JOIN SELECT e.last_name, e.department_id, d.department_name FROM employees e LEFT OUTER JOIN departments d ON (e.department_id = d.department_id) ; «
33. RIGHT OUTER JOIN SELECT e.last_name, e.department_id, d.department_name FROM employees e RIGHT OUTER JOIN departments d ON(e.department_id = d.department_id) ; «
34. FULL OUTER JOIN SELECT e.last_name, e.department_id, d.department_name FROM employees e FULL OUTER JOIN departments d ON (e.department_id = d.department_id) ; «
35. Additional Conditions SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON(e.department_id = d.department_id) AND e.manager_id = 149 ;