Module 13 (Introduction to SQL - Part 2).pdf
Module 13 (Introduction to SQL - Part 2).pdf
Module 13 (Introduction to SQL - Part 2).pdf
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SubqueriesThis is a powerful technique, introducedearlier for the IN clause example.You can use an entire chunk of SELECTstatement (called the subquery) whereverregular data is expected.Where you can do this depends on the waythis subquery returns data.