MySQL 插入记录

# 插入记录
# 通用语法
-- 插入单条记录
INSERT INTO t_dept (deptno,dname,loc)
VALUES(50,"技术部","GUANGZHOU");

-- 插入多条记录
INSERT INTO t_dept (deptno,dname,loc)
VALUES(60,"后期部","HANGZHOU"),(70,"保安部","HANGZHOU");

# 向技术部添加一条员工记录
INSERT INTO t_emp
(empno,ename,job,mgr,hiredate,sal,comm,deptno)
VALUES(8002,"黄六","SALESMAN",8000,"1988-12-19",2000,NULL,
(SELECT deptno FROM t_dept WHERE dname = "技术部"));  # 子查询的应用只能是单行单列

# MySQL方言语法
INSERT INTO t_emp SET empno=8003,ename="何七",job="SALESMAN",mgr=8000,hiredate="1985-3-14",sal=1500,comm=NULL,deptno=50;

# 删除记录
DELETE FROM t_emp WHERE empno=8003;

# IGNORE关键字会让INSERT只插入数据库不存在的记录,跳过报错
-- 重复插入单条记录
INSERT IGNORE INTO t_emp SET empno=8003,ename="何七",job="SALESMAN",mgr=8000,hiredate="1985-3-14",sal=1500,comm=NULL,deptno=50;
-- 插入多条记录
INSERT IGNORE INTO t_dept (deptno,dname,loc)
VALUES(80,"产品部","HANGZHOU"),(70,"保安部","HANGZHOU");