Way to Join only the first record
How Do I in Oracle SQL make Left join between two tables which take only the first record in the right join?
For Example
Table 1:
A 100
B 200
C 300
Table:2
A 900
A 300
The Result will be
A 100 900
B 200 null
C 300 null
Thanks
Senior Developer
Otherwise just use a sub-query as source for the left joined table, which return a single row.
I agree you should set up a subquery as table source, which delivers only those rows you want to have joined. As soon as you are able to write up that query, the remainder is easy.
Information Technology Specialist
select t1.col1 as t1_value, t2.col1 as t2_value from
(select col1, rownum rn from table1) t1
left join
(select col1, rownum rn from table2
where rownum = 1) t2
on t1.rn = t2.rn;
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