PL/SQL equivalent of working T-SQL Query

Question

Hi All,
I am new to Oracle and trying to port some select statements written in MS SQL Server over to Oracle but I am having a few difficulties with one of them.
The following query works OK in MS SQL Server:
UPDATE rptPolicySnapshot
SET NoOfLivesTotal=
SELECT (SELECT COUNT(DISTINCT EntityID)
FROM PolicyBeneficiary
WHERE InfoId = 55
AND PolicyId=P.PolicyID
AND PolEffDate = P.EffectiveDate)
(SELECT COUNT(DISTINCT EntityID)
FROM PolicyBeneficiary
WHERE InfoId = 57
AND PolicyId=P.PolicyID
AND PolEffDate = P.EffectiveDate)
FROM rptPolicySnapshot P WHERE P.PolicyType = 1
I basically want to update each individual row in the table rptPolicySnapshot with the correct information as calculated for that row (the key being PolicyID and EffectiveDate in all the tables) within the inner query, i.e. matching on PolicyID and EffectiveDate.
As I said this works fine in SQL Server, but I cannot work out how to do this in Oracle. If I run the above query in Oracle I get the following error:
'ORA-00923: FROM keyword not found where expected'
Any help would be much appreciated, thanks!

Answer 1

Try
UPDATE rptPolicySnapshot P
  SET NoOfLivesTotal=
     (SELECT COUNT(DISTINCT EntityID)
      FROM PolicyBeneficiary
      WHERE InfoId = 55
      AND PolicyId=P.PolicyID
      AND PolEffDate = P.EffectiveDate)
     (SELECT COUNT(DISTINCT EntityID)
      FROM PolicyBeneficiary
      WHERE InfoId = 57
      AND PolicyId=P.PolicyID
      AND PolEffDate = P.EffectiveDate)
WHERE P.PolicyType = 1Message was edited by:
ascheffer