Quick References for Writing SQL Queries
KEYWORD: SELECT\FROM\WHERE\AND\OR
SELECT column_name(s) FROM table_name
WHERE condition AND|OR condition
KEYWORD: ALTER\ADD\DROP\COLUMN
ALTER TABLE table_name
ADD column_name datatype
ALTER TABLE table_name
DROP COLUMN column_name
KEYWORD: AS
SELECT column_name AS column_alias
FROM table_name
SELECT column_name
FROM table_name AS table_alias
KEYWORD: BETWEEN\AND
SELECT column_name(s)
FROM table_name
WHERE column_name
BETWEEN value1 AND value2
KEYWORD: CREATE\DATABASE
CREATE DATABASE database_name
KEYWORD: TABLE
CREATE TABLE table_name
(
column_name1 data_type,
column_name2 data_type,
column_name2 data_type,
…)
KEYWORD: INDEX\UNIQUE INDEX
CREATE INDEX index_name
ON table_name (column_name)
CREATE UNIQUE INDEX index_name
ON table_name (column_name)
KEYWORD: VIEW
CREATE VIEW view_name AS
SELECT column_name(s)
FROM table_name
WHERE condition
KEYWORD: DELETE
DELETE FROM table_name
WHERE some_column=some_value
DELETE FROM table_name (Deletes the entire table)
DELETE * FROM table_name (Deletes the entire table)
KEYWORD: DROP
DROP DATABASE database_name
KEYWORD: INDEX
DROP INDEX table_name.index_name
KEYWORD: DROP\TABLE
DROP TABLE table_name
KEYWORD: EXISTS
IF EXISTS (SELECT * FROM table_name WHERE id = ?)
BEGIN
–do what needs to be done if exists
END
ELSE
BEGIN
–do what needs to be done if not
END
KEYWORD: GROUP BY
SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_name operator value
GROUP BY column_name
KEYWORD: HAVING
SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_name operator value
GROUP BY column_name
HAVING aggregate_function(column_name) operator value
KEYWORD: IN
SELECT column_name(s)
FROM table_name
WHERE column_name
IN (value1,value2,..)
KEYWORD: INSERT INTO
INSERT INTO table_name
VALUES (value1, value2, value3,….)
INSERT INTO table_name
(column1, column2, column3,…)
VALUES (value1, value2, value3,….)
KEYWORD: INNER JOIN\ON
SELECT column_name(s)
FROM table_name1
INNER JOIN table_name2
ON table_name1.column_name=table_name2.column_name
KEYWORD: LEFT JOIN
SELECT column_name(s)
FROM table_name1
LEFT JOIN table_name2
ON table_name1.column_name=table_name2.column_name
KEYWORD: RIGHT JOIN
SELECT column_name(s)
FROM table_name1
RIGHT JOIN table_name2
ON table_name1.column_name=table_name2.column_name
KEYWORD: FULL JOIN
SELECT column_name(s)
FROM table_name1
FULL JOIN table_name2
ON table_name1.column_name=table_name2.column_name
KEYWORD: LIKE
SELECT column_name(s)
FROM table_name
WHERE column_name LIKE pattern
KEYWORD: ORDER BY\ASC\DESC
SELECT column_name(s)
FROM table_name
ORDER BY column_name [ASC|DESC]
KEYWORD: SELECT
SELECT column_name(s)
FROM table_name
KEYWORD: SELECT\DISTINCT
SELECT DISTINCT column_name(s)
FROM table_name
KEYWORD: SELECT\INTO
SELECT *
INTO new_table_name [IN externaldatabase]
FROM old_table_name
SELECT column_name(s)
INTO new_table_name [IN externaldatabase]
FROM old_table_name
KEYWORD: TOP
SELECT TOP number|percent column_name(s)
FROM table_name
KEYWORD: TRUNCATE
TRUNCATE TABLE table_name
KEYWORD: UNION
SELECT column_name(s) FROM table_name1
UNION
SELECT column_name(s) FROM table_name2
KEYWORD: UNION ALL
SELECT column_name(s) FROM table_name1
UNION ALL
SELECT column_name(s) FROM table_name2
KEYWORD: UPDATE\SET
UPDATE table_name
SET column1=value, column2=value,…
WHERE some_column=some_value
KEYWORD: WHERE
SELECT column_name(s)
FROM table_name
WHERE column_name operator value
Reference:
http://www.w3schools.com/sql/sql_quickref.asp
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