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作者 DreamHssH 在 PTT [ Database ] 看板的留言(推文), 共9則
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Re: [SQL ] 如何找出現次數最多的
[ Database ]2 留言, 推噓總分: +1
作者: hukhuk - 發表於 2012/02/11 17:55(14年前)
1F推DreamHssH:感謝解答02/12 04:25
[SQL ] 如何一次參照兩個父鍵
[ Database ]8 留言, 推噓總分: 0
作者: DreamHssH - 發表於 2012/02/08 05:32(14年前)
1F→DreamHssH:還是說像上面的例子 就把它拆成三列:02/08 06:40
2F→DreamHssH:INSERT INTO Table2('1', ...);02/08 06:40
3F→DreamHssH:INSERT INTO Table2('3',後面同上);02/08 06:41
4F→DreamHssH:INSERT INTO Table2('8',後面同上);02/08 06:42
5F→DreamHssH:這樣就都可以找到對應的父項鍵了 但是很浪費表格~02/08 06:43
6F→DreamHssH:不確定還會有些甚麼問題，懇請板友解答~!02/08 06:43
7F→DreamHssH:有發現 這樣會違反Primary Key唯一的條件02/08 07:07
8F→DreamHssH:似乎有想到方法了 弄成多對一 再一對多! 明天試試看02/08 13:35
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