按如下要求写出sql语句:
create table user2 as(select*from user where false)
insert into user2 (select*from user where city='北京')
create table user3 as(select user.userId,name,money from user,card where false)
insert into user3(select a.userId,name,money from user a,card b where a.userId=b.userId)
create table user4 as(select * from user where sex='男')
insert into card VALUES('100',now(),1000,'132456','0','101')
insert into transinfo (transDate) values(NOW())
select *from transinfo