關於SQL優化的小知識

負向查詢不命中索引 不命中數據庫 select account from user where id not in (1,2,3); 複製代碼 命中工具 select account from user where id in (4,5,6); 複製代碼 前置模糊查詢不命中索引 不命中post select account from user where name like '%lufei' 複製

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