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Advanced SQL Queries: Subqueries, Unions, and Window Functions

Tutorial August 03, 2024
sql

SELECT column1 FROM table1
UNION
SELECT column1 FROM table2;
SELECT name FROM employees_us
UNION
SELECT name FROM employees_uk;

SQL Joins: A Comprehensive Guide to Combining Tables

Tutorial August 03, 2024
sql

Result:

The LEFT JOIN returns all records from the left table and the matched records from the right table. Unmatched records from the right table are returned as NULL.