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摘要: select sum(case when depart = 'Physical' then 1 else 0 end) PhyTotal, sum(case when depart = 'Chemistry' then 1 else 0 end) CheTotal,sum(case when dep... 阅读全文
posted @ 2015-04-27 12:08 仰望星空的耕田人 阅读(506) 评论(0) 推荐(0) 编辑