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數據庫原理in的用法
數據庫原理in的用法
更新时间:2026-01-25 13:18:13

  在數據庫SQL語句中,如果事先已經知道至少一個需要的值,将這些知道的值都放入IN這個子句。IN指令的語法為下:SELECT "欄位名" FROM "表格名" WHERE "欄位名" IN (“值一”,“值二”)。在括弧内可以有一或多個值,而不同值之間由逗點分開,值可以是數目或是文字。

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