已知條件: 有如下資料庫表: tb_studentselect * from tb_student(1)在tb_student表額外新增一列 L3VPN,並且該L3VPN列無需含有預設值ALTER TABLE tb_student ADD ...
檢視全文»已知條件: 有如下資料庫表: tb_studentselect * from tb_student(1)在tb_student表額外新增一列 L3VPN,並且該L3VPN列無需含有預設值ALTER TABLE tb_student ADD ...
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