[請益] 如何在MYSQL裡面新增自訂的流水號?
例如會員資料表為member
id欄位為自訂流水號
我想讓id欄位變成M_001 下次有人辦會員會自動變成M_002
身邊的書沒提到...所以上來求救!!!
麻煩了 感謝!
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