sql 语法

语句	语法
AND / OR	SELECT column_name(s)
FROM table_name
WHERE condition
AND|OR condition
ALTER TABLE (add column)	ALTER TABLE table_name 
ADD column_name datatype
ALTER TABLE (drop column)	ALTER TABLE table_name 
DROP COLUMN column_name
AS (alias for column)	SELECT column_name AS column_alias
FROM table_name
AS (alias for table)	SELECT column_name
FROM table_name  AS table_alias
BETWEEN	SELECT column_name(s)
FROM table_name
WHERE column_name
BETWEEN value1 AND value2
CREATE DATABASE	CREATE DATABASE database_name
CREATE INDEX	CREATE INDEX index_name
ON table_name (column_name)
CREATE TABLE	CREATE TABLE table_name
(
column_name1 data_type,
column_name2 data_type,
.......
)
CREATE UNIQUE INDEX	CREATE UNIQUE INDEX index_name
ON table_name (column_name)
CREATE VIEW	CREATE VIEW view_name AS
SELECT column_name(s)
FROM table_name
WHERE condition
DELETE FROM	DELETE FROM table_name 
(Note: Deletes the entire table!!)
or

DELETE FROM table_name
WHERE condition

DROP DATABASE	DROP DATABASE database_name
DROP INDEX	DROP INDEX table_name.index_name
DROP TABLE	DROP TABLE table_name
GROUP BY	SELECT column_name1,SUM(column_name2)
FROM table_name
GROUP BY column_name1
HAVING	SELECT column_name1,SUM(column_name2)
FROM table_name
GROUP BY column_name1
HAVING SUM(column_name2) condition value
IN	SELECT column_name(s)
FROM table_name
WHERE column_name
IN (value1,value2,..)
INSERT INTO	INSERT INTO table_name
VALUES (value1, value2,....)
or

INSERT INTO table_name
(column_name1, column_name2,...)
VALUES (value1, value2,....)

LIKE	SELECT column_name(s)
FROM table_name
WHERE column_name
LIKE pattern
ORDER BY	SELECT column_name(s)
FROM table_name
ORDER BY column_name [ASC|DESC]
SELECT	SELECT column_name(s)
FROM table_name
SELECT *	SELECT *
FROM table_name
SELECT DISTINCT	SELECT DISTINCT column_name(s)
FROM table_name
SELECT INTO
(used to create backup copies of tables)	SELECT *
INTO new_table_name
FROM original_table_name
or

SELECT column_name(s)
INTO new_table_name
FROM original_table_name

TRUNCATE TABLE
(deletes only the data inside the table)	TRUNCATE TABLE table_name
UPDATE	UPDATE table_name
SET column_name=new_value
[, column_name=new_value]
WHERE column_name=some_value
WHERE	SELECT column_name(s)
FROM table_name
WHERE condition