I am seeking help on the following issue:
I have two tables
Table_1
columns are itemid
, locationid
, quantity
Table_2
columns are itemid
, location1
, location2
, location3
I want to copy data from Table_1
(only quantity
column) into Table_2
(into location1
column). The itemid
are same in both the tables(Table_1
has duplicate item id's) so that's the reason I want to copy to a new table and keep all quantity in one single row with each location as a column. I am using the below query but it doesn't work
INSERT INTO
Table_2(location1)
(
SELECT qty
FROM Table_1
WHERE locationid = 1 AND Table_1.locationid = Table_2.locationid
)
If table_2
is empty, then try the following insert statement:
insert into table_2 (itemid,location1)
select itemid,quantity from table_1 where locationid=1
If table_2
already contains the itemid
values, then try this update statement:
update table_2 set location1=
(select quantity from table_1 where locationid=1 and table_1.itemid = table_2.itemid)