SQLSERVER 中GO的作用详解

use db_CSharp
go
 select *,
 备注=case 
 when Grade>=90 then "成就优良"
 when Grade<90 and Grade>=80 then "成就良好"
 when Grade<80 and Grade>=70 then "成就合格"
 else "不合格"
 end 
 from tb_Grade
use db_CSha