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create table test
(
testid int not null,
testname nvarchar(50) null,
testpassword nvarchar(50) null
)
insert into test(testid,testname,testpassword) values(1,'张三','12')
insert into test(testid,testname,testpassword) values(2,'李四','34')
insert into test(testid,testname,testpassword) values(3,'王五','56')
insert into test(testid,testname,testpassword) values(4,'赵六','78')
select testid,testname from test
select testpassword from test
--select testid,testname from test
--select testpassword from test
--这两条语句是必须的,主要是通过这两条语句把两条语句的查询结果拼接成一个table
--想要的结果
testid testname testpassword
----------- -------------------------------------------------- --------------------------------------------------
1 张三 12
2 李四 34
3 王五 56
4 赵六 78