摘要:
--聚合函数use pubsgoselect avg(distinct price) --算平均数from titleswhere type='business'go use pubsgoselect max(ytd_sales) --最大数from titlesgo use pubsgoselect min(ytd_sales) --最小数from titlesgo use pubsgosele... 阅读全文
posted @ 2009-05-19 14:24
杰克帝.NET
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