SELECT idcard,YEAR (NOW()) - substring(idcard, 7, 4) as nFROM es_members where idcard >0 HAVING n >=65 根据身份证 选择年龄段的用户 YEAR 返回日期的年份,范围为1000〜9999,或者0日期. NOW 函数返回当前的日期和时间.例如: 2008-12-29 16:25:46 substring (被截取字段,从第几位开始截取,截取长度) 结果
//校验手机号 function IsMobileNumber( num:string ):boolean; begin Result:=False; if length( trim( Num ) ) <> 11 then Exit; if ( ( copy( num, 1, 2) <> '13' ) and ( copy( num , 1, 2) <> '15' ) ) then Exit; try StrToInt(