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.