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DateDiff ÅжÏÁ½¸öÈÕÆÚÖ®¼äµÄ¼ä¸ô select DateDiff("d","2006-5-1","2006-6-1")·µ»Ø31,ÆäÖÐd¿ÉÒÔ»»Îªyyyy,m,HµÈ
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select * from OpenRowSet('Microsoft.Jet.OLEDB.4.0', 'Excel 8.0;HDR=Yes;IMEX=1;Database=c:\2003.xls', [kg$])
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