What Is The Difference Between Distinct And Group By? Distinct is used to find unique/distinct records where as a group by is used to group a selected set of rows into summary rows by one or more columns or an expression. … The group by gives the same result as of distinct when no aggregate
How Do You Select Unique Records From A Table? SELECT DISTINCT returns only distinct (different) values. DISTINCT eliminates duplicate records from the table. DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc. DISTINCT operates on a single column. How do I SELECT unique records from a table in SQL? The SELECT DISTINCT statement is
Does Distinct Affect Performance? Does distinct affect performance? 4 Answers. Yes, as using DISTINCT will (sometimes according to a comment) cause results to be ordered. Sorting hundreds of records takes time. Does distinct improve performance? Yes, the application needs to compare every record to the “distinct” records cache as it goes. You can improve performance