Querry Question - Substrings - With Answer Solution

Question

In my database table, there is one field for the employee name in the order of (
LastName,FirstName) Example (Brian,Robbin,D) and I have another field for the Address in order of (City State Zip) Example (Clinton Twp Mi 48045).
Bellow I have a SQL query that actually work but what I need to do is to incorporate into this query where only the LastName is selected and where only the zip code is selected.
I believe I have to write a subtr clause for the zip but how to just select the lastname and not the LastName and full name.
Querry
Select Ballots.FULLNAME,
Ballots.ROWID,
Ballots.DATE_RETURNED,
Ballots.DATE_SENT,
Ballots.APP_RETURNED
from ABSENTEE_BALLOTS Ballots
Where trim(upper(address1)) like trim (upper(:street))|| '%' and trim (upper(address2)) = trim(upper(:zip)) and trim (upper(FULLNAME)) = trim(upper(:name)) and to_char(dob)=:birthDate ||"
Here is the answer bellow:
SELECT AbsenteeBallots.FULLNAME,
AbsenteeBallots.ROWID,
AbsenteeBallots.DATE_RETURNED,
AbsenteeBallots.DATE_SENT,
AbsenteeBallots.APP_RETURNED,
AbsenteeBallots.DOB
FROM ABSENTEE_BALLOTS AbsenteeBallots
WHERE trim(upper(address1)) like trim(upper(:street)) ||'%' and substr (upper(address2),-5,5) = upper(:zip) and substr(upper(FULLNAME), 1,instr(upper(FULLNAME),',')-1) = upper((:name)) and to_char(dob) = :birthDate ||''
Message was edited by:
CindyOnstar

Answer 1

No, you have to compare that substring to something. Right now you are doing a substring and getting everything before the first comma and not comparing it to anything.
SELECT
FROM
    SELECT
       'LAST_NAME, FIRST_NAME' a
    FROM
       DUAL
WHERE
   substr(a, 1, instr(a, ',') - 1);
   substr(a, 1, instr(a, ',') - 1)
ERROR at line 11:
ORA-00920: invalid relational operatorbut this will work 'cause I compare it (hence it's a clause in the where clause)
SELECT
FROM
    SELECT
       'LAST_NAME, FIRST_NAME' a
    FROM
       DUAL
WHERE
   substr(a, 1, instr(a, ',') - 1) = 'LAST_NAME' ;
A
LAST_NAME, FIRST_NAMEBTW, try putting [ code ] before and [ /code ] around your SQL (minus the spaces before/after the [ and ]) to make your SQL easier to read