sqlserver 动态sql执行execute和sp_executesql

　sp_executesql的运用
　　书写语法要点:
　　exec sp_executesql @sql,N’参数1 类型1,参数2 类型2,参数3 类型3 OUTPUT’,参数1,参数2,参数3 OUTPUT;
　　注意参数前后顺序必须对应好 如下图不同颜色的标记

declare @ID int declare @Oid int declare @Login varchar(50)     --定义一个游标  declare zb_cur cursor for select zb_gl.zb_sql_gs from zb_gl declare @zb_sql varchar(2000) declare @ymd varchar(20) set @ymd='2019-1-1' --打开游标  open zb_cur   while  0=0 begin --读取游标      fetch next from zb_cur into @zb_sql 	if @@FETCH_STATUS=0  	  begin  	      set @zb_sql=N'select zj_cydlv from scsj_account_daily_jz where ymd=@ymd and jz=1' 		  print @zb_sql 		  exec sp_executesql N'select zj_cydlv from scsj_account_daily_jz where ymd=@ymd and jz=1',N'@ymd varchar(20)',@ymd 	  end 	else 	  break end  close zb_cur  --摧毁游标  deallocate zb_cur