mysql常用语句列表

增

• 增加一张表

CREATE TABLE `table_name`(
  ...
  )ENGINE=InnoDB DEFAULT CHARSET=utf8;

• 增加记录

INSERT INTO `your_table_name`(`column_name_one`,`column_name_two`)
VALUES
('your_value_one','your_value_two');

• 增加字段

ALTER TABLE `your_table_name`
ADD `your_column_name` ...
AFTER `column_name`;

• 增加索引

主键

ALTER TABLE `your_table_name`
ADD PRIMARY KEY your_index_name(your_column_name);

唯一索引

ALTER TABLE `your_table_name`
ADD UNIQUE your_index_name(your_column_name);

普通索引

ALTER TABLE `your_table_name`
ADD INDEX your_index_name(your_column_name);

全文索引

ALTER TABLE `your_table_name`
ADD FULLTEXT your_index_name(your_column_name);

删

• 逐行删除

DELETE FORM `table_name`
WHERE ...;

• 清空整张表

TRUNCATE TABLE `your_table_name`;

• 删除表

DROP  TABLE `your_table_name`;

• 删除字段

ALTER TABLE `your_table_name`
DROP `column_name`;

• 删除索引

ALTER TABLE `your_table_name`
DROP INDEX your_index_name;

改

• 变更数据

UPDATE `table_name`
SET column_name=your_value
WHERE ...;

• 变更字段

ALTER TABLE `your_table_name`
CHANGE `your_column_name` `your_column_name` ;

查

• 普通查询

SELECT `column_name_one`, `column_name_two`
FROM `table_name`;

• 普通查询

SELECT *
FROM `your_table_name`
AS a
JOIN `your_anther_table_name`
AS b
WHERE a.column_name = b.column_name...;

• 合计函数条件查询：WHERE 关键字无法与合计函数一起使用

SELECT aggregate_function(column_name)
FROM your_table_name
GROUP BY column_name
HAVING aggregate_function(column_name)...;

• 完全复制一张表：表结构+全部数据

CREATE TABLE `your_table_name` LIKE `destination_table_name`;
INSERT INTO `your_table_name`
SELECT *
FROM `destination_table_name`;