表数据追加插入SQL

[johndiyang]

有表A和表B的表结构完全一致，A,B中有部分数据相同，如何把A中的数据追加插入到B表中？即，如果A表中的数据x在B表存在，不插入，如果不存在则插入B表。

[bancxc]

trucate table b
insert into b
select * fro a

[chuifengde]

insert b select a.* from a left join b on a.key=b.key where b.key is null

[htl258_Tony]

insert B select * from A where not exists(select 1 from B where a.x=b.x)

[ACMAIN_CHM]

insert into b select * from a

[--小F--]

insert B select * from A where not exists(select 1 from B where a.x=b.x)

[htl258_Tony]

--2005

insert b select * from A except select * from b

[johndiyang]

多谢各路大侠~！

[心中的彩虹]

insert b select * from a except select * from b

except--是找出表A中有的表B中没有的数据

[幸运的意外]

insert B select * from A where not exists(select 1 from B where A.主键字段1=B.主键字段1 and A.主键字段2 = B.主键字段2 and.....)