SQL 事务

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--SQL事务
BEGIN TRANSACTION
declare @MaxDelete int = 0 ;  --最大可删除的行数
 
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--执行的SQL语句
DELETE TableName Where FieldName = ''


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--判断影响的行数,超过限定就回滚
if (@@rowcount > @MaxDelete )
    begin 
        print '删除行数过多,已经回滚'
        rollback transaction
    end
else 
    begin 
        print '操作成功'
        commit transaction
    end

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