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SQL-Clauses-Operators

38 posts

SQL | Concatenation Operator

Last Updated: 06 January 2025

The SQL concatenation operator (||) is a powerful feature that allows us to merge two or more strings into a single output. It is widely used to link columns, character st...read more

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SQL-Clauses-Operators

SQL | Alternative Quote Operator

Last Updated: 21 March 2018

This post is a continuation of the SQL Concatenation Operator.Now, suppose we want to use apostrophe in our literal value but we can't use it directly.See Incorrect code:S...read more

SQL-Clauses-Operators

SQL | DESCRIBE Statement

Last Updated: 10 May 2023

Prerequisite: SQL Create ClauseAs the name suggests, DESCRIBE is used to describe something. Since in a database, we have tables, that's why do we use DESCRIBE or DESC(bot...read more

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SQL-Clauses-Operators

SQL Commands | DDL, DQL, DML, DCL and TCL Commands

Last Updated: 18 June 2025

SQL commands are crucial for managing databases effectively. These commands are divided into categories such as Data Definition Language (DDL), Data Manipulation Language ...read more

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SQL-Clauses-Operators

SQL Server MERGE Statement

Last Updated: 14 July 2025

SQL Server MERGE statement combines INSERT, UPDATE, and DELETE operations into a single transaction.MERGE in SQL ServerThe MERGE statement in SQL provides a convenient way...read more

SQL-Clauses-Operators

SQL MERGE Statement

Last Updated: 09 May 2024

SQL MERGE Statement combines INSERT, DELETE, and UPDATE statements into one single query.MERGE Statement in SQLMERGE statement in SQL is used to perform insert, update, an...read more

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SQL-Clauses-Operators

SQL | Intersect & Except clause

Last Updated: 30 June 2022

1. INTERSECT clause : As the name suggests, the intersect clause is used to provide the result of the intersection of two select statements. This implies the result contai...read more

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SQL-Clauses-Operators

SQL | USING Clause

Last Updated: 06 January 2025

The SQL USING clause is a crucial feature in SQL that simplifies table join operations by allowing developers to specify common columns between tables. It enhances query r...read more

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Technical Scripter

SQL-Clauses-Operators

SQL | With Ties Clause

Last Updated: 21 March 2018

This post is a continuation of SQL Offset-Fetch ClauseNow, we understand that how to use the Fetch Clause in Oracle Database, along with the Specified Offset and we also u...read more

SQL-Clauses-Operators

Pivot and Unpivot in SQL

Last Updated: 12 July 2025

In SQL, PIVOT and UNPIVOT are powerful operations used to transform data and make it more readable, efficient, and manageable. These operations allow us to manipulate tabl...read more

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SQL LIKE Operator

Last Updated: 05 December 2024

The SQL LIKE operator is used for performing pattern-based searches in a database. It is used in combination with the WHERE clause to filter records based on specified pat...read more

SQL-Clauses-Operators

SQL DROP CONSTRAINT

Last Updated: 28 November 2024

In SQL, constraints are used to ensure data integrity and define rules for the data in our database tables. These rules include ensuring uniqueness, maintaining referentia...read more

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SQL-Clauses-Operators

SQL TRUNCATE TABLE

Last Updated: 06 September 2024

The TRUNCATE TABLE statement in SQL is a powerful command used to swiftly remove all rows from a table, leaving the table structure intact. This operation is often favored...read more

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SQL-Clauses-Operators

Last Updated: 06 December 2024

UNION ALL Operator is used to combine the results of two or more SELECT statements into a single result set. Unlike the UNION operator, which eliminates duplicate records ...read more

SQL-Clauses-Operators

SQL Left Outer Join vs Left Join

Last Updated: 20 November 2024

In SQL, LEFT JOIN and LEFT OUTER JOIN are among the most commonly used join operations to combine data from multiple tables. These terms are interchangeable, as both retri...read more

SQL-Clauses-Operators