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tblT ±í½á¹¹
Fyear int 4
Fmonth int 4
FAA  int  4
¼ÙÉèÊý¾Ý
Fyear          Fmonth      FAA
2009          12          0
2009            8        0
2010          1          0
2010          2          1

´«Èë²ÎÊý ÄêºÍÔ ×öΪÅжÏÌõ¼þ ºÍfyear ,fmonth ¹ØÁªÅжϡ£ ±ÈÈç ´«Èë2010-1
ÎÒÏë°Ñ СÓÚµÈÓÚ2010-1µÄFAAÊý¾Ý¶¼Í³Ò»ÐÞ¸ÄΪ1
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ÎÒ֮ǰдµÄÊÇ  update tblT  set FAA='1' where  FYear <=2010 and FMonth <=1
µ«ÊÇ·¢ÏÖÊDz»¶ÔµÄ¡£Çë´ó¼Ò°ïæһÏ£¬Ð»Ð»À²
SQL code:
update tblT
set FAA='1'
where datediff(mm,ltrim(fyear)+ltrim(Fmonth)+'01','201001')>=0


SQL code:
update
tblT
set
FAA='1'
where
datediff(mm,ltrim(fyear)+ltrim(Fmonth)+'01','201001'+'01')>=0


ÒýÓÃ
SQL codeupdate tblTset FAA='1'wheredatediff(mm,ltrim(fyear)+ltrim(Fmonth)+'01','201001')>=0

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