CREATE TABLE ORDER_SRC
(
ORDER_ID INTEGER,
ORDER_TEMPLATE_ID INTEGER
);
INSERT INTO ORDER_SRC VALUES(1,3);
INSERT INTO ORDER_SRC VALUES(2,4);
INSERT INTO ORDER_SRC VALUES(3,6);
INSERT INTO ORDER_SRC VALUES(4,1);
INSERT INTO ORDER_SRC VALUES(5,5);
INSERT INTO ORDER_SRC VALUES(6,2);
SEL * FROM ORDER_SRC;
CREATE TABLE ORDER_TGT
(
ORDER_KEY INTEGER,
ORDER_ID INTEGER,
ORDER_TEMPLATE_KEY INTEGER
);
INSERT INTO ORDER_TGT VALUES(10,1,30);
INSERT INTO ORDER_TGT VALUES(20,2,40);
INSERT INTO ORDER_TGT VALUES(30,3,60);
INSERT INTO ORDER_TGT VALUES(40,4,10);
INSERT INTO ORDER_TGT VALUES(50,5,50);
INSERT INTO ORDER_TGT VALUES(60,6,20);
SEL * FROM ORDER_TGT;
SEL
S.ORDER_ID,S.ORDER_TEMPLATE_ID,T.ORDER_ID,T.ORDER_KEY
FROM ORDER_SRC S LEFT OUTER JOIN ORDER_TGT T ON S.ORDER_TEMPLATE_ID=T.ORDER_ID
Source:
ORDER_ID ORDER_TEMPLATE_ID
1 3
2 4
3 6
4 1
5 5
6 2
Expected Target data:
ORDER_KEY ORDER_ID ORDER_TEMPLATE_KEY
10 1 30
20 2 40
30 3 60
40 4 10
50 5 50
60 6 20
I need to get ORDER_KEY from target using source.order_template_id=target.order_id and update that order_key in target.order_template_key
For eg: Take ORDER_TEMPLATE_ID from source i.e. 3 and find the match in target which is 3 and get the order_key for that row and that key will be the order_template_key for order_id=1
I have tried using LEFT OUTER JOIN,but there is a confusion araised to solve this.
Please help me in this regard.
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