Loop statement in oracle

Question

SOurce Table
ID ADDRESS1 ADDRESS2
11 12 QA ST. 16 SELI ST.
12 455 LANE 3222 ROGER LANE
Target Table:
ID TYPE ADDRESS1 ADDRESS2
11 NORMAL XYZ st.
11 HIGH ABC st.
12 NORMAL TYU st.
12 HIGH XCV st.
Description of Problem:
I have a source table in which ADDRESS1 pertains to Address1 column in target table where type= 'NORMAL' and ADDRESS2 pertains to Address 2 column in target table where type = 'HIGH'
I want to update the target table using source table on ID so that Address column in target table is updated corresponding to the ADDRESS 1 AND ADDRESS 2 columns from source table.
I am using the following code:
MERGE
INTO TARGET tgt
USING SOURCE src
ON (src.ID = tgt.ID)
WHEN MATCHED
THEN
UPDATE
SET tgt.address1 = src.address1
where TGT.type = '=NORMAL'
How can i update the address2 column in the target table where type = 'HIGH'
in one shot.
I dont want to write two seprate queries.
I think i can use loop statement.
Please Advice as how to use loop, else any other suggestion.
Thanks

Answer 1

user11018028 wrote:
SOurce Table
ID ADDRESS1 ADDRESS2
11 12 QA ST. 16 SELI ST.
12 455 LANE 3222 ROGER LANE
Target Table:
ID TYPE ADDRESS1 ADDRESS2
11 NORMAL XYZ st.
11 HIGH ABC st.
12 NORMAL TYU st.
12 HIGH XCV st.
Description of Problem:
I have a source table in which ADDRESS1 pertains to Address1 column in target table where type= 'NORMAL' and ADDRESS2 pertains to Address 2 column in target table where type = 'HIGH'
I want to update the target table using source table on ID so that Address column in target table is updated corresponding to the ADDRESS 1 AND ADDRESS 2 columns from source table.
I am using the following code:
MERGE
INTO TARGET tgt
USING SOURCE src
ON (src.ID = tgt.ID)
WHEN MATCHED
THEN
UPDATE
SET tgt.address1 = src.address1
where TGT.type = '=NORMAL'
How can i update the address2 column in the target table where type = 'HIGH'
in one shot.
I dont want to write two seprate queries.
I think i can use loop statement.
Please Advice as how to use loop, else any other suggestion.
ThanksMaybe this? If you provide scripts for create tables and sample data this wouldn't be a guess :)
MERGE
INTO TARGET tgt
USING SOURCE src
ON (src.ID = tgt.ID)
WHEN MATCHED
THEN
UPDATE
SET tgt.address1 = case when TGT.type  = 'NORMAL' then src.address1 else tgt.address1 end
,   tgt.address2 = case when TGT.type != 'NORMAL' then src.address2 else tgt.address2 end