Question

Is this possible?

I’m trying to do a SQL statement on an alias but getting an error…

SELECT 
      CASE PERSON_TYPE  WHEN 'PER' THEN LAST_NAME
                                   ELSE COMPANY_NAME
      END AS FULLNAME, *
FROM PERSON
[WHERE FULLNAME LIKE '%AN%'] // Error FULLNAME - INvalid COlumn Name

otherwise, this is the alternative I’m using….

WHERE (LAST_NAME LIKE '%AN%') OR (COMPANY_NAME LIKE '%AN%')

Thanks

Answer 1

You have two solutions.

One is to pass the FULLNAME to the WHERE CLAUSE like this:

SELECT 
      CASE PERSON_TYPE  WHEN 'PER' THEN LAST_NAME
                                   ELSE COMPANY_NAME
      END AS FULLNAME, PERSON.*
FROM PERSON
WHERE (PERSON_TYPE = 'PER' AND LAST_NAME LIKE '%AN%') OR (COMPANY_NAME LIKE '%AN%')

THe other is to make an INNER QUERY like this:

SELECT t.*
FROM (SELECT *, CASE PERSON_TYPE  
                  WHEN 'PER' THEN LAST_NAME 
                  ELSE COMPANY_NAME END AS FULLNAME
FROM PERSON ) t
WHERE t.FULLNAME LIKE '%AN%'