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Does order of columns matter in Union?
The union statement puts the two selects together by order, not by name. The order has to be the same in all of the queries you’re unioning together. Beyond that, the general order of the columns in the query as a whole doesn’t matter.
Can I use ORDER BY with union all?
It is not possible to use two different ORDER BY in the UNION statement. However, if your requirement is such that you want your top and bottom query of the UNION resultset independently sorted but in the same resultset you can add an additional static column and order by that column.
How to use order by with Union all in SQL?
Use a big enough number to capture all of the data you require. and union these together. this was the only way i was able to get around the error and worked fine for me. SELECT * FROM (SELECT * FROM TABLE_A ORDER BY COLUMN_1)DUMMY_TABLE UNION ALL SELECT * FROM TABLE_B ORDER BY 2; 2 is column number here ..
Can you add a static column to the Union resultet?
UNION returns single resultsetand as per the Logical Query Processing Phases. However, if your requirement is such that you want your top and bottom query of the UNION resultset independently sorted but in the same resultset you can add an additional static column and order by that column. Let us re-create the same scenario.
Can you use two different order bys in a Union statement?
It is not possible to use two different ORDER BY in the UNION statement. UNION returns single resultsetand as per the Logical Query Processing Phases.
How to order by column in SQL Server?
We will get the data in following order. However, our requirement is to get data in following order. If we need data ordered by Column1 we can ORDER the resultset ordered by Column1. Now to get the data in independently sorted in UNION ALL let us add additional column OrderKey and use ORDER BY on that column.