select d_id from department union select d_id from employee;
select d_id from department union all select d_id from employee;
mysql——多表——合并查询结果
标签：val arch alt wan cti ima UNC address res
mysql——多表——合并查询结果
table employee ( num int(50),
d_id int(50),
name varchar(50),
age int(50),
sex varchar(50),
homeadd varchar(50)
);
insert into employee values(1,1001,‘zhangsan‘,26,‘nan‘,‘beijing‘);
insert into employee values(2,1001,‘lisi‘,24,‘nv‘,‘hunan‘);
insert into employee values(3,1002,‘wangwu‘,25,‘nan‘,‘jiangsu‘);
insert into employee values(4,1004,‘aric‘,15,‘nan‘,‘yingguo‘);
select * from employee;
create table department ( d_id int(50),
d_name varchar(50),
functione varchar(50),
address varchar(50)
);
insert into department values(1001,‘keyanbu‘,‘yanfachanpin‘,‘3lou5hao‘);
insert into department values(1002,‘shengchanbu‘,‘shengchanchanp‘,‘5louyiceng‘);
insert into department values(1003,‘xiaoshoubu‘,‘cehuaxiaoshou‘,‘1louxiaoshoudating‘);
select * from department;