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.
Practically, it can be done in multiple ways with varying performance stats and scope of extension. The Oracle EXISTS operator can suitably fit into such scenarios which require the check for existence of a parent query record in a subquery. Example Code [1] achieves it with the use of EXISTS operator. Example Code [1]