SQL 快速参考

Posted by Julius on January 13, 2016

SQL 语句

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
WHERE condition
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)
(NOT IN MYSQL!!)
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
摘录自 W3School 的 SQL 快速参考
首次创建时间:2014-03-02

This work is licensed under a CC A-S 4.0 International License.