SQLSERVER下的SQL 编写

create table tb1 (blh varchar(100),zd1 varchar(100),zd2 varchar(100),zd3 varchar(100))
insert into tb1 values(‘11’,‘A1’,‘A2’,‘A3’)
insert into tb1 values(‘12’,‘A1’,‘B2’,‘B3’)
insert into tb1 values(‘13’,‘B1’,‘A2’,‘A3’)
insert into tb1 values(‘14’,‘A2’,‘A1’,‘B3’)
insert into tb1 values(‘15’,‘A3’,‘A2’,‘B1’)

create table tb2 (zd_code varchar(10),zd_name varchar(100))
insert into tb2 values(‘A1’,‘面包1’)
insert into tb2 values(‘A2’,‘面包2’)
insert into tb2 values(‘A3’,‘面包3’)
insert into tb2 values(‘B1’,‘面包4’)
insert into tb2 values(‘B2’,‘面包5’)
insert into tb2 values(‘B3’,‘面包6’)

将TB1的代码替换成TB2的值