作者查詢 / hukhuk
作者 hukhuk 在 PTT [ Database ] 看板的留言(推文), 共45則
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4F推:我怎覺得order by那句是多餘的10/08 21:10
1F推:hadoop不是資料庫09/28 12:26
4F推:就left outer join 吧11/17 22:52
1F推:你是在哪執行sql ?10/26 13:08
3F推:二者差異的還是錢10/20 23:52
4F推:開DMZ10/20 16:14
1F→:不是可以自己灌mysql或postgresql04/26 18:56
1F→:then 'CF'04/26 12:34
3F推:select S.SNAME04/14 17:44
4F→:from SP NATURAL JOIN P NATURAL join S04/14 17:44
5F→:where P.COLOR='Blue'04/14 17:45
6F→:group by SP.S#04/14 17:45
7F→:having count(*)>=1;04/14 17:45
3F推:用差集?03/27 15:35