Army intensifying Stinger air missile training as part of new strategic initiatives; Army takes the lead in virtual health technology with opening of new Texas facility; Army task force fights Boko Haram, terrorism in Cameroon with youth outreach; Army builds sustaining military partnership with Saudi Arabia
This SQL tutorial explains how to use the SQL EXISTS condition with syntax and examples. Click the Try It button next to an example to test it for yourself in our SQL Editor. The SQL EXISTS condition is used in combination with a subquery and is considered to be met, if the subquery returns at least one row.
SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions: SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table. SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column.