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SQL-Clauses

15 posts

SELECT TOP Clause

Last Updated: 29 January 2026

The SELECT TOP clause in SQL only returns the specified number of rows from the table. It is valuable on enormous tables with a large number of records. Returning countles...read more

Last Updated: 11 September 2023

In SQL, a Cartesian Join is also called a Cross Join, it performs the cartesian product of records of two or more joined tables. A Cartesian product matches each row of on...read more

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Order of Execution of SQL Queries

Last Updated: 21 January 2026

SQL queries are often explained using a specific order of execution, but this order should be understood as a logical processing order, not the actual execution sequence. ...read more

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SQL TOP, LIMIT, FETCH FIRST Clause

Last Updated: 10 November 2025

The SQL TOP, LIMIT, and FETCH FIRST clauses are used to restrict the number of rows returned by a query. They help in retrieving only a small portion of data from a large ...read more

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SQL SELECT IN Statement

Last Updated: 02 May 2026

The IN operator is used to check whether a column’s value matches any value in a given list.It is used to:Compare a column with multiple values at once.Return TRUE if a ma...read more

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SQL - SELECT DATE

Last Updated: 23 July 2025

SQL (Structured Query Language) can work with datetime data types. SELECT DATE is an important concept when retrieving records that filter data based on date. Whether you ...read more

Difference Between JOIN, IN and EXISTS Clause in SQL

Last Updated: 23 July 2025

SEQUEL widely known as SQL, Structured Query Language is the most popular standard language to work on databases. We can perform tons of operations using SQL which include...read more

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Difference Between

WHERE vs HAVING Clause in SQL

Last Updated: 25 August 2025

WHERE is used to filter rows before any grouping or aggregation happens, while HAVING is used to filter groups or aggregated results after GROUP BY.WHERE Clause in SQLWHER...read more

Difference between DELETE and TRUNCATE

Last Updated: 11 February 2026

DELETE and TRUNCATE are SQL commands are used to remove data from tables, but they differ in behavior and performance. They are used to:DELETE remove selected rows using a...read more

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Difference between DROP and TRUNCATE in SQL

Last Updated: 12 July 2025

In SQL, the DROP and TRUNCATE commands are used to remove data, but they operate differently. DROP deletes an entire table and its structure, while TRUNCATE removing only ...read more

Difference Between COMMIT and ROLLBACK in SQL

Last Updated: 04 December 2025

In SQL, transaction control is essential for managing changes in a database effectively. COMMIT and ROLLBACK are two crucial Transaction Control Language (TCL) commands th...read more

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Difference between JOIN and UNION in SQL

Last Updated: 12 July 2025

Pre-requisites: JOIN, UNIONJOIN in SQL is used to combine data from many tables based on a matched condition between them. The data combined using the JOIN statement resul...read more

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Difference Between

How to Use GROUP BY and HAVING in SQL?

Last Updated: 12 July 2025

The GROUP BY and HAVING clauses in SQL are two of the most powerful tools available for summarising and analysing data. These clauses enable developers and analysts to eff...read more

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MySQL PARTITION BY Clause

Last Updated: 25 March 2026

The PARTITION BY clause in MySQL divides the result set into smaller groups so calculations can be performed independently within each group. It is mainly used with window...read more

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SQL | ON Clause

Last Updated: 13 May 2018

The join condition for the natural join is basically an EQUIJOIN of all columns with same name. To specify arbitrary conditions or specify columns to join, the ON Clause i...read more

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