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SQL CHEAT SHEET http://www.sqltutorial
SQL AGGREGATE FUNCTIONS AVG returns the average of a list CREATE TEMPORARY VIEW v AS SELECT c1, c2 FROM t; Create a temporary view WHEN • BEFORE –invoke before the event occurs • AFTER –invoke after the event occurs EVENT • INSERT –invoke for INSERT • UPDATE –invoke for UPDATE • DELETE –invoke for DELETE TRIGGER_TYPE • FOR ...
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SQL CHEAT SHEET http://www.sqltutorial
www.sqltutorial.orgCREATE INDEX idx_name ON t(c1,c2); Create an index on c1 and c2 of the table t MANAGING INDEXES CREATE VIEW v(c1,c2) AS SELECT c1, c2 FROM …
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