How to resolve this syntax error in a postgresql sql query to update multiple rows in a single column

I am needing to update multiple rows in a single column in a postgresql db

I have this:

UPDATE tableA
SET
  column_a = CASE WHEN column_a = 'conserve' THEN column_a = 'fixed',
  column_a = CASE WHEN column_a = 'balance' THEN column_a = 'moderate',
  column_a = CASE WHEN column_a = 'balance growth' THEN column_a = 'moderate growth',
  column_a = CASE WHEN column_a = 'aggressive' THEN column_a = 'moderate/agressive';

but am getting a syntax error

Error: syntax error at or near ","

>Solution :

You can do it with one single CASE statement:

UPDATE tableA
SET
  column_a = CASE WHEN column_a = 'conserve'       THEN 'fixed'
                  WHEN column_a = 'balance'        THEN 'moderate'
                  WHEN column_a = 'balance growth' THEN 'moderate growth'  
                  WHEN column_a = 'aggressive'     THEN 'moderate/agressive'
             END;

Try it here.