Read this SQL ... to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when combining data ...

If your business uses relational databases to store data, it helps to use the SQL SELECT ... a new table from the results of two separate queries with the UNION keyword. Build a SELECT statement ...

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...