dwm 是命令吗
<font face="Verdana">select * from txda where fftz='1' and tlbh='3' and txymd<='2006-12-31' and dwm not in ('00340','00339','00338')其中<font face="Verdana">dwm not in ('00340','00339','00338')是什么意思???<font face="Verdana">dwm 是命令吗???</font></font></font> <p>dwm应该是字段名</p><p> </p>
<p><font face="Verdana"><font face="Verdana">dwm not in ('00340','00339','00338')</font></font></p>
<p>是指显示的记录数中,dwm不包括'00340','00339','00338'</p> <p>楼上解释得对,这是基本的sql语句。</p> dwn是数据库表中的字段名
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