SQL SELECT with DISTINCT on multiple columns - w3resource
hint 'leading' 'ordered' issue when using 'count(distinct xxx)' - Oracle Forums
SQL Performance: SELECT DISTINCT versus GROUP BY - Stack Overflow
2. Tutorial Base Datos - Oracle: Select, distinct, order by - YouTube
SUM(1) vs SUM(DISTINCT 1) – 1Z0-061 Oracle SQL
SQL Aggregate Functions in SQL Server, Oracle and PostgreSQL
oraclesql SQL- query to find out the distinct values from two tables
How to Use the Select Distinct Clause in Oracle
SQL COUNT() with DISTINCT - w3resource
DISTINCT in Oracle | Examples to Use DISTINCT in Oracle
hint 'leading' 'ordered' issue when using 'count(distinct xxx)' - Oracle Forums
database - "NUM DISTINCT" in Oracle Column Properties - Stack Overflow
Oracle DISTINCT Clause - javatpoint
SQL Distinct on one column only | Oscar Valles
Oracle SELECT DISTINCT By Practical Examples
DISTINCT in Oracle | Examples to Use DISTINCT in Oracle
Oracle/SQL - Need help optimizing COUNT DISTINCT query - Stack Overflow
How To Use SQL DISTINCT Statement With Multiple Columns | RebellionRider
