>thank you ,i found it...
>set filter to atc(trim("?"),myfiled ) > 0
>
>>hi all,
>>
>>i need help to delete or filter myfield (names), many of names have ? inside the name,
>>as mohammed ? qasem, edwa?rd ,ali al?era....etc,
>>if any record (field names) have just ? delete it,
>>
>>thanks

There are several alternatives, but in all cases, the basic condition is:

... "?" $ MyField

The at() function should also work, but the $ operator is simpler in this case. "string" $ "some longer string" means: the first string is contained within the longer string.

Alternatives for the other commands, assuming you want to delete the RECORDS:

For viewing (and deleting), you can use a filter. BROWSE to view, DELETE ALL or DELETE REST to delete.

You can use SELECT - SQL to view.

You can use DELETE FROM (the SQL command) to delete.

If you want to delete the INVALID CHARACTERS but keep the remaining data, the closest to a "search and replace" is the strtran() function (but see also chrtran()):

use MyTable
replace all MyField with StrTran(MyField, "?", "")
* or
update MyTable set MyField = StrTran(MyField, "?", "")

Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)