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Subqueries can be specified in many places:
- With aliases. For more information, see Subqueries with Aliases.
- With IN or NOT IN. For more information, see Subqueries with IN and Subqueries with NOT IN.
- In UPDATE, DELETE, and INSERT statements. For more information, see Subqueries in UPDATE, DELETE, and INSERT Statements.
- With comparison operators. For more information, see Subqueries with Comparison Operators.
- With ANY, SOME, or ALL. For more information, see Comparison Operators Modified by ANY, SOME, or ALL.
- With EXISTS or NOT EXISTS. For more information, see Subqueries with EXISTS and Subqueries with NOT EXISTS.
- In place of an expression. For more information, see Subqueries Used in Place of an Expression.