标签：修改 增删改查 基础 var creat mysql语法 into select bsp
建表语句
2 CREATE TABLE `students`(‘id‘INT NOT NULL AUTO_INCREMENT,`name`VARCHAR(200)NOT NULL); 3 4 USE `school`; 5 6 CREATE TABLE `students`( 7 `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY, 8 `name` VARCHAR(20) NOT NULL, 9 `nickname` VARCHAR(20) NULL, 10 `sex` CHAR(1) NULL, 11 `in time` DATETIME NULL 12 );
插入语句
INSERT INTO `table` VALUE(S)(...);
INSERT INTO `students` VALUE(1,‘张三‘,‘三哥‘,‘男‘,now());
如果有空置，那么可以写成以下代码：
INSERT INTO `students`(`name`,`nickname`) VALUE(‘张三‘,‘三哥‘);
如果插入多条信息呢
INSERT INTO `students`(`name`,`nickname`) VALUES (‘张三2‘,‘三哥2‘), (‘张三3‘,‘三哥3‘), (‘张三2‘,‘三哥2‘) ;
查询语句
SELECT
select_expr,...
SELECT * FROM `students`;
or
SELECT `id`,`name`,`nickname`FROM `students` WHERE `sex`=‘男‘;
倒序
SELECT `id`,`name`,`nickname`FROM `students` WHERE `sex`=‘男‘ ORDER BY `id` DESC;
分页
SELECT `id`,`name`,`nickname`FROM `students` WHERE `sex`=‘男‘ ORDER BY `id` DESC LIMIT 4,2 ;
修改语句
UPDATE table_references
SET col_name1 = expr1[,col_name2=expr2...]
[WHERE where_definition]
UPDATE `students` SET `sex` =‘女‘ WHERE `sex`=‘男‘;
UPDATE `students` SET `sex` =‘女‘, `nickname` =‘没有昵称‘;
删除
DELETE FROM
DELETE FROM `students` WHERE `sex`=‘男‘;
标签：修改 增删改查 基础 var creat mysql语法 into select bsp
原文地址：https://www.cnblogs.com/zhujing666/p/12308142.html
