SQL Clauses
SELECT
SELECT * SELECT COLUMN1, COLUMN2,… SELECT DISTINCT (COLUMN1) SELECT COUNT(*)
Description: Defines columns to display as part of query output.
FROM
FROM TABLE1, TABLE2, TABLE3,…
Description: Defines tables from which to retrieve data.
WHERE
WHERE COLUMN1 = 'VALUE1'
AND COLUMN2 = 'VALUE2'
…
WHERE COLUMN1 = 'VALUE1'
OR COLUMN2 = 'VALUE2'
…
WHERE COLUMN IN ('VALUE1' [, 'VALUE2'] )
Description: Defines conditions (criteria) placed on a query for data to be returned.
GROUP BY
GROUP BY GROUP_COLUMN1, GROUP_COLUMN2,…
Description: A form of a sorting operation; used to divide output into logical groups.
HAVING
HAVING GROUP_COLUMN1 = 'VALUE1' AND GROUP_COLUMN2 = 'VALUE2' …
Description: Similar to the WHERE clause; used ...
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