两个字段相同的表，怎样把A表数据批量导入B表中，且自动跳过重复数据？
两个字段相同的表，怎样把A表数据批量导入B表中，且自动跳过重复数据？
谢谢大家！！！
[解决办法]
create table #a(id int,nam varchar(20))
create table #b(id int,nam varchar(20))
insert into #b select 1, 'a '
union select 1, 'b '
union select 2, 'b '
union select 2, 'a '
insert into #a select distinct * from #b
select * from #a
select * from #b
drop table #a
drop table #b
[解决办法]
INSERT INTO tableB SELECT a.* FROM tableA as a LEFT JOIN tableB as b on a.ID = b.ID WHERE a.ID IS NULL
[解决办法]
create table #t1(ID int)
create table #t2(ID int)
insert #t1 select 1
union all select 2
union all select 3
insert #t2 select 4
union all select 2
union all select 6
insert into #t2 select #t1.ID from #t1 where #t1.ID not in(select ID from #t2 where #t2.ID=#t1.ID)
select * from #t2
drop table #t1
drop table #t2
[解决办法]
insert into tab select * from tab1 where tab1.id not in(select id from tab)
[解决办法]
两个字段相同的表，怎样把A表数据批量导入B表中，且自动跳过重复数据？
谢谢大家！！！
insert into b select * from a where id not in (select id from b)
