mysql自增主鍵在大量刪除後如何從新設置避免斷層

select * from tt; +----+ | id | +----+ |  1 | |  2 | |  3 | |  4 | |  5 | |  6 | |  7 | |  8 | |  9 |rem delete from tt where id=8; Query OK, 1 row affected (0.01 sec) delete from tt where id=9; Query

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