SQL 快速参考
· Previous Page
· Next Page
来自 W3School 的 SQL 快速参考。可以打印它,以备日常使用。
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
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
本文档为【SQL 快速参考】,请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑,
图片更改请在作品中右键图片并更换,文字修改请直接点击文字进行修改,也可以新增和删除文档中的内容。
该文档来自用户分享,如有侵权行为请发邮件ishare@vip.sina.com联系网站客服,我们会及时删除。
[版权声明] 本站所有资料为用户分享产生,若发现您的权利被侵害,请联系客服邮件isharekefu@iask.cn,我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。