This video is on EXISTS and NOT EXISTS clause in Structured Query Language.

The EXISTS and NOT EXISTS are the functions that are used in correlated nested query. These condition in SQL is used to test whether the result of a correlated nested query is empty (null) or not. The result of EXISTS is True or False. It can be used in a SELECT, UPDATE, INSERT or DELETE statement.

Important Video Links for SQL Lectures:
Introduction to Structured query language: [ Ссылка ]
SQL Basics & Execution Flow: [ Ссылка ]
Aggregate Functions: [ Ссылка ]
Group By Clause: [ Ссылка ]
Having Clause: [ Ссылка ]
Except Clause: [ Ссылка ]
Nested Queries (Part 1) : [ Ссылка ]
Nested Queries (Part 2) : [ Ссылка ]
Exists and Not Exists Clause: [ Ссылка ]
Practice Problems on Exists & Not Exists Clause: [ Ссылка ]
Division in SQL: [ Ссылка ]

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