What is EXISTS operator?

What is EXISTS operator?

The SQL EXISTS is an operator that is used with the WHERE clause that tests the existence of rows by using a subquery.
If that subquery in the EXISTS contains any row, it returns TRUE.

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The BETWEEN Operator in SQL

The BETWEEN Operator in SQL

The SQL BETWEEN operator is used to specify a range to test. You may use BETWEEN operator with SELECT statement for retrieving data for the given range. The BETWEEN operator can also be …

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The GROUP BY clause in SQL

The GROUP BY clause in SQL

The GROUP BY is a clause in SQL that is used with the SELECT statement for grouping the rows. The purpose is generally performing the aggregate operation like SUM, COUNT, AVG etc. to the group data.

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The MAX function in SQL

The MAX function in SQL

The SQL MAX function is used to return the maximum value for the specified column in the SELECT statement. If the specified column is character based then highest value in the collating sequence is returned.

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