Convert decode oracle pl/sq to ms sql and help required on logic

Question

I have below oracle query need to converted to ms sql. I also want to add a record into journal table when a 
 insert portion is executed  "caseidinserted" and update portion executed then "caseidupdate".
Update table1 target
set curr =
decode(
    select efforts from (
    select source.efforts efforts
      from
        SELECT     a.aid,a.efforts,ab.lcs
            FROM     CIP a, DC ab
            WHERE    a id = ab.id
            AND    a.id = @id
      ) source
      where target.caseid = @caseidupd
      and target.aid = source.aid
    ) tmp, 0, tmp.efforts, curr
modi = getdate( )
where exists
select 1
from table1 tgt
where tgt.aid = target.aid
and tgt.caseid = @caseidupd
insert into table1 values(caseid, aid, modi)
    select @caseidupd, source.aid, getdate()
      from
        SELECT     a.aid,a.efforts,ab.lcs
            FROM     CIP a, DC ab
            WHERE    a id = ab.id
            AND    a.id = @id
      ) source
    where not exists
        select 1
        from table1 target
        where target.aid = source.aid
        and target.caseid = @caseidupd
something like this...
INSERT (caseid,aid,modi)
 select @caseidupd,'appupdated'+source.aid,getdate()
 INSERT (caseid,aid,modi)
  select (@caseidupd,'appinserted'+source.aid,getdate()

Answer 1

Hello,
I am not familiar with Oracle Function. If I understand correctly, you can MERGE to perform INSERT and UPDATE operations on a table in a single statement. Please refer to the following statements:
MERGE INTO table1 AS Target
USING (select @caseidupd, source.aid, getdate()
from
SELECT a.aid,a.efforts,ab.lcs
FROM CIP a, DC ab
WHERE a id = ab.id
AND a.id = @id
) As Source (caseidupd,aid,date )
ON Target.aid = source.aid and target.caseid =source.caseidupd
WHEN MATCHED THEN
UPDATE SET Target.curr=...,--query for get values
Target.modi=getdate()
WHEN NOT MATCHED BY TARGET THEN
INSERT (caseid,aid,modi) values (caseidupd,'appupdated'+source.aid,getdate())
Reference:http://msdn.microsoft.com/en-us/library/bb510625.aspx
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support