What do you understand by a subquery?When is it used?

Started by Maxx, October 24, 2014, 11:05:42 AM

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Patryk

October 24, 2014, 11:05:42 AM
Hi, I would like to submit a question, I hope you can answer me, what do you understand by a subquery? when is it used? Please give me your help very quickly.
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