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I answered part of your question in #262621. As far as HAVING, please get any SQL book and look into the chapter of GROUP BY for greater details.

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(#262626@0)
2001-11-15 -04:00
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Back To Topic: 闲来无事, 出道ORACLE SQL的题考考大家. 这是在下几个月前工作中遇到的问题, 看似简单, 其实不然.

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