实际 删除 的 行数 在 _ cRowsDeleted _ 中 返回 。 如果 找 不 到 一 个 或 多 个 行 , 则 不 会 返回 错误 。

The number of rows that were actually deleted is returned in _ cRowsDeleted _ . No error is returned if one or more rows could not be found .
