>>the lenth of my filed(chr) is 11. some entry in this filed as =11 some are less than 11. now i want to selct records which is less than 11.
>>
>>in filed=345678901
>>=12345678
>>I want slect scond record
>
>

select * from myTable where LEN(myField) < 11

&& Not Rushmore optimizable
>
>This is if myField is character. If it's numeric, you would need to use
>
>LEN(transform(myField))<11

LEN(MyFIeld) always have the same value (the defined one) :-)
But LEN(ALLTRIM(MyField)) is another question :-)
Also if the field is numeric better test for:
MyField < 100000000000 (did I count zeros well?) and that will be optimizable (If you have index of course :-))