/*
插入数据
方式1: INSERT INTO 表名(列1,列2……,列n) VALUES(值1,值2…..,值n);
方式2: INSERT INTO 表名 set 列名1=值1,..列名n=值n;
方式3: INSERT INTO 表名(列1,列2……,列n) VALUES(值1,值2…..,值n),(值1,值2…..,值n);
方式4:INSERT INTO 表名(列1,列2……,列n) 查询语句(查询的列数与插入列数匹配)
*/INSERTINTO student(NAME,sex,birthday,grade,score,phone,address,reg_time)VALUE('tom','男','2000-1-2',1,98,'15929101866','xian',NOW())INSERTINTO student SET NAME='张三',sex='男',birthday='2020-1-3',grade=2,score=97,phone='15959421585',address='陕西',reg_time=NOW()INSERTINTO student(NAME,sex,birthday,grade,score,phone,address,reg_time)VALUES('李四','男','2000-1-2',3,98,'15929101899','咸阳',NOW()),('王五','女','2000-1-4',3,98,'15929101888','咸阳',NOW()),('李六','男','2000-1-5',3,98,'15929101877','咸阳',NOW())-- 表名后不描述,表示向表中所有的列插入数据 值得数量应与列的数量相匹配 INSERTINTO stu(num,NAME,sex,birthday,grade,score,phone,address,reg_time)SELECT*FROM student
-- 修改表数据UPDATE student SET NAME ='李四',sex='男'-- 添加条件UPDATE student SET NAME ='赵六',sex='女'WHERE num =2233-- 删除语句DELETEFROM student WHERE num =2237-- 清空表数据TRUNCATETABLE student
ALTERTABLE student MODIFY num INTAUTO_INCREMENT