SELECT COUNT DISTINCT last_name FROM users

1. How do you do a distinct count in select?
2. Can you use count with distinct?
3. How do I count distinct records in SQL?
4. How do I count distinct rows?

How do you do a distinct count in select?

The correct syntax for using COUNT(DISTINCT) is: SELECT COUNT(DISTINCT Column1) FROM Table; The distinct count will be based off the column in parenthesis. The result set should only be one row, an integer/number of the column you're counting distinct values of.

Can you use count with distinct?

Yes, you can use COUNT() and DISTINCT together to display the count of only distinct rows. SELECT COUNT(DISTINCT yourColumnName) AS anyVariableName FROM yourTableName; To understand the above syntax, let us create a table. Display all records from the table using select statement.

How do I count distinct records in SQL?

SELECT COUNT (DISTINCT item_num) FROM items; If the COUNT DISTINCT function encounters NULL values, it ignores them unless every value in the specified column is NULL. If every column value is NULL, the COUNT DISTINCT function returns zero (0).

How do I count distinct rows?

The COUNT(DISTINCT) function returns the number of rows with unique non-NULL values. Hence, the inclusion of the DISTINCT keyword eliminates duplicate rows from the count. Its syntax is: COUNT(DISTINCT expr,[expr...])