Question

I have a database in the following format:

idA | idB | stringValue
----+-----+------------
xyz |  1  | ANDFGFRDFG
xyz |  2  | DTGDFHFGH
xyz |  3  | DFDFDS
abc |  5  | DGDFHHGH
abc |  6  | GG
...

idA and idB together are unique.

I have a file (list.txt) with a list of id pairs like this:

xyz 2
abc 5
abc 6
...

and I would like to print it with stringValue in each row. Note some pairs of ids from the file might be absent from the DB. In that case, I don’t want to print them at all.

In short, I want to filter a table using a file.

Answer 1

SELECT idA, idB, stringValue FROM table WHERE idA = 'xyz' AND idB = 12;

Would give you all columns where idA equals “xyz” and idB equals 12.