I am trying to retrieve data from a table, but I need the resulting cursor to prioritize the ordering of the first row, then for each value in the first column I need it to check and add the rows from the second column based on that value.
From:
| Note | ID_1 | ID_2|
|------|------|-----|
| abc | 1 | NULL|
| bcd | 2 | NULL|
| ghu | 3 | NULL|
| cde | 4 | 2 |
| def | 5 | 1 |
To:
| Note | ID_1 | ID_2|
|------|------|-----|
| abc | 1 | NULL|
| def | 5 | 1 |
| bcd | 2 | NULL|
| cde | 4 | 2 |
| ghu | 3 | NULL|
I don't actually need it to reorder the table, I just need the cursor being returned to return the values in that order. I tried ordering it by the first column, then checking the second column, and a few other things, but I have not had any success.
SELECT * FROM TBL_X ORDER BY ID_1, ID_2
Is this even possible to do in a SQL Query?
I think you want:
select t.*
from t
order by coalesce(id_2, id_1), id_1
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