优化后的标题：封装游标存储过程以提升SQL执行效率（Pr_execsql2）

使用脚本自己可以执行自己的特性,封装游标操作存储过程如下:
CREATE PROCEDURE Pr_ExecSQL2
@Asqlstring VARCHAR(8000) --输入的SQL语句
AS
EXEC ('
--启动事务

BEGIN TRAN

DECLARE @ASql VARCHAR(8000)
DECLARE tnames_cursor CURSOR LOCAL FAST_FORWARD FOR '+ @asqlstring +'
OPEN tnames_cursor
FETCH NEXT FROM tnames_cursor INTO @ASql
WHILE (@@FETCH_STATUS=0)
BEGIN
print @ASql
EXEC (@ASql)
IF @@ERROR <> 0 GOTO FINALEX99v
FETCH NEXT FROM tnames_cursor INTO @ASql
END
CLOSE tnames_cursor
DEALLOCATE tnames_cursor

COMM99v TRAN
RETURN

FINALEX99v:
ROLLBACK TRAN
CLOSE tnames_cursor
DEALLOCATE tnames_cursor

')
使用方法:
declare @sql varchar(8000)
set @sql='select ''update a set a.a='' + b.a from b '
exec Pr_execsql2 @sql