SQL : How to do count(distinct) for multiple columns
SQL DISTINCT STATEMENT | SQL TUTORIAL | BEGINNER SQL TUTORIAL | SQL DISTINCT MULTIPLE COLUMNS
SQL Distinct and Multiple Columns
SQL count query example| MySQL Count Distinct with condition
How to Use COUNT DISTINCT with Two Columns in SQL Server
COUNT, DISTINCT, and NULLs in SQL Server
Count occurrences of distinct values | Oracle SQL Server
SQL : How to SELECT COUNT multiple values in one column
SQL Server: Count vs. Count Distinct Function
SQL : Select distinct values from multiple columns in same table
How to get COUNT of DISTINCT VALUES in SQL
MySQL: Select count distinct
Retrieving the Distinct Count Across Multiple Columns in SQL Server
Basic Aggregate Functions in SQL (COUNT, SUM, AVG, MAX, and MIN)
2-Minute SQL Tips: Finding Unique Values Using COUNT DISTINCT
#sqlqueries Find distinct count of rows using SQL query
How to Group by Columns in SQL: Counting Distinct and Finding Max Values
Distinct - SQL Select Distinct or Unique Values From Multiple Tables - Intact Abode
counting distinct over multiple columns