Syntax error “Missing keyword” in case statement in WHERE clause

Question

I am having some syntax error in my case statement where I am checking below condition:

((RAP10B.CLMSRC = \'2\', RAP01.EFFDT - 3 years <= RAP10.LOSSDT < RA         


        

Answer 1

It's generally much better to use AND/OR constructions in the WHERE clause instead of case expressions:

WHERE (RAP10B.CLMSRC = '2'
       AND rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) AND rap01.teffdt_t)
   OR (RAP10B.CLMSRC <> '2'
       AND rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) AND (rap01.teffdt_t - 60))

Answer 2

Try below -

CASE
  WHEN RAP10B.CLMSRC = '2'
  and rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) AND rap01.teffdt_t then yourval
  WHEN RAP10B.CLMSRC <> '2'
  and rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) AND (rap01.teffdt_t - 60) yourval1
END 

Answer 3

Are you looking for something like this?

CASE
   WHEN RAP10B.CLMSRC = '2'
      AND rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) 
      AND rap01.teffdt_t THEN <your_column>
   WHEN RAP10B.CLMSRC <> '2'
      AND rap10.lossdt_t BETWEEN Add_months(rap01.teffdt_t, - 36) 
      AND (rap01.teffdt_t - 60) THEN <your_column>
END