12 lines
573 B
PHP
12 lines
573 B
PHP
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A subquery can contain any of the keywords or clauses that an ordinary SELECT query can contain.
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<br \><br \>
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Some advantages of the subqueries:
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<ul>
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<li \>They allow queries that are structured so that it is possible to isolate each part of a statement.
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<li \>They provide alternative ways to perform operations that would otherwise require complex joins and unions.
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<li \>They are, in many people's opinion, readable. Indeed, it was the innovation of subqueries that gave people the original idea of calling the early SQL <EFBFBD>Structured Query Language.<EFBFBD>
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</ul>
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