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Joins & Subqueries
Documentation on the JOIN, UNION, EXCEPT and INTERSECT clauses, and on subqueries.
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Joins
Querying from multiple tables -
Subqueries
Queries within queries -
EXCEPT
Subtraction of two result sets. -
INTERSECT
Records that are present in both result sets will be included in the result of the operation. -
Precedence Control in Table Operations
Controlling order of execution in SELECT, UNION, EXCEPT, and INTERSECT. -
UNION
Combine the results from multiple SELECT statements into a single result set.
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