SQL query to find the value of a column as well!
Hi allI have to write a query that needs to retrieve the value of a column in table B if the column value is Null in the Table A. Please find below the sample table.
Table A:
*******
EmpNumber ID
------------------------------
1 12345
2
3 14789
4
5 74563
Table B:
*******
EmpNumber ID
-----------------------------
1 12345
2 78451
3 14789
4 12212
5 74563
In the table a second and third rows have value for EmpNumber. The query should look for table B for EmpNumber value. Please advise me to make this request.
Thank you
This?
select a.id,
nvl(a.empnumber,b.empnumber) empnumber
from tabA a, tabB b
where a.id = b.id;
Tags: Database
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