Question

Im trying to write a query that updates a date only if the group im updating has a LINE_CD of 50. Would i do it like this?

UPDATE EMPLOYER_ADDL  
SET EMPLOYER_ADDL.GTL_UW_APPRV_DT = EMPLOYER_ADDL.DNTL_UW_APPRV_DT 
WHERE EXISTS
    ( 
      SELECT EMP_PLAN_LINE_INFO.LINE_CD
      FROM EMP_PLAN_LINE_INFO
      Where EMP_PLAN_LINE_INFO.GR_NBR = EMPLOYER_ADDL.GR_NBR and
       EMP_PLAN_LINE_INFO.LINE_CD = 50
     )

Answer 1

What about this?

UPDATE ea  
SET ea.GTL_UW_APPRV_DT = ea.DNTL_UW_APPRV_DT 
FROM EMPLOYER_ADDL ea
    INNER JOIN EMP_PLAN_LINE_INFO ei ON(ei.GR_NBR = ea.GR_NBR)
WHERE 
ei.LINE_CD = 50