How can I get distinct count of multiple columns in SQL?

How can I get distinct count of multiple columns in SQL Server?

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.SQL SELECT with DISTINCT on multiple columns - w3resource

How do I select the number of distinct multiple columns in SQL?

How to count distinct values over multiple columns using SQL1Method-1 Using a derived table (subquery) You can simply create a select distinct query and wrap it inside of a select count(*) sql, like shown below: ... 2Method-2 Using Concatenated columns. ... 3Method-3 If performance is a factor.How to count distinct values over multiple columns using SQL

How can I count distinct values of all columns in SQL?

To count the number of different values that are stored in a given column, you simply need to designate the column you pass in to the COUNT function as DISTINCT . When given a column, COUNT returns the number of values in that column. Combining this with DISTINCT returns only the number of unique (and non-NULL) values.

Can we use distinct for 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. Feel free to test this out in the editor to see what happens!