How do I use distinct instead of group by?

How do I use distinct instead of group by?

DISTINCT is used to filter unique records out of the records that satisfy the query criteria. The “GROUP BY” clause is used when you need to group the data and it should be used to apply aggregate operators to each group.

Can you ORDER BY column not in select?

Yes, you can order by a field(s)even if it is not your in your select statement but exists in your table.

What happens if I group by a column that is not in the select statement?

You can not select aggregates across a field if you don’t include the field in the group by list. The results are unpredictable and you may get different result for the same data/query. would be valid.

How do you use distinct by ORDER BY clause?

If we add the DISTINCT operation, it would be added between SELECT and ORDER BY :

1. FROM MonitoringJob.
2. SELECT Category, CreationDate.
3. DISTINCT.
4. ORDER BY CreationDate DESC.
5. SELECT Category.

Can we use distinct and ORDER BY together?

There is no way this query can be executed reasonably. Either DISTINCT doesn’t work (because the added extended sort key column changes its semantics), or ORDER BY doesn’t work (because after DISTINCT we can no longer access the extended sort key column).

Can we use distinct *?

The distinct keyword is used with select keyword in conjunction. It is helpful when we avoid duplicate values present in the specific columns/tables. The unique values are fetched when we use the distinct keyword. SELECT DISTINCT returns only distinct (different) values.

How to use distinct in same SELECT statement?

Distinct will sort records in ascending order. If you want to sort in desc order use: If you want to sort records based on CreationDate field then this field must be in the select statement: Try next, but it’s not useful for huge data… Thanks for contributing an answer to Stack Overflow!

Is there a way to order by distinct in SQL?

SELECT Category i.e. remove the extended sort key column again from the result. So, thanks to the SQL standard extended sort key column feature, it is totally possible to order by something that is not in the SELECT clause, because it is being temporarily added to it behind the scenes. So, why doesn’t this work with DISTINCT?

How to use order by in same SELECT statement?

Extended sort key columns. 1 FROM MonitoringJob. 2 SELECT Category, CreationDate i.e. add a so called extended sort key column. 3 ORDER BY CreationDate DESC. 4 SELECT Category i.e. remove the extended sort key column again from the result.

Why does select category not work in SQL?

The reason why what you want to do doesn’t work is because of the logical order of operations in SQL, which, for your first query, is (simplified): SELECT Category i.e. remove the extended sort key column again from the result.