摘要: use Northwind;if object_id('tb_Letters',N'U') is not null begindrop table tb_Letters;end;create table tb_Letters( letter char(1));insert into tb_Letters select 'A';insert into tb_Letters select 'B';insert into tb_Letters select 'C';insert into tb_Letters selec
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posted @ 2011-04-08 18:26 K3 阅读(10) 评论(0)
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