Does SELECT distinct apply to all columns?

Does distinct apply to multiple columns?

Answer. Yes, the DISTINCT clause can be applied to any valid SELECT query. It is important to note that DISTINCT will filter out all rows that are not unique in terms of all selected columns.

How do I use distinct for all columns in SQL?

DISTINCT on multiple columns1Sample Select statement.2Select with distinct on two columns.3Select with distinct on three columns.4Select with distinct on all columns of the first query.5Select with distinct on multiple columns and order by clause.6Count() function and select with distinct on multiple columns.

Does distinct apply to all columns SQL Server?

SELECT DISTINCT FIELD1, FIELD2, FIELD3 FROM TABLE1 works if the values of all three columns are unique in the table. If, for example, you have multiple identical values for first name, but the last name and other information in the selected columns is different, the record will be included in the result set.

What will happen if you apply distinct on whole table?

Adding the DISTINCT keyword to a SELECT query causes it to return only unique values for the specified column list so that duplicate rows are removed from the result set.