Read this SQL tutorial to learn when to use ... return rows for which there is data in both tables. Compare the following query after using JOIN instead of WHERE: SELECT table1.column1, table2 ...

Simply join two SELECT statements with the UNION keyword to combine the results of two queries into a new table. When working with databases other than Microsoft's SQL Server, check the manual to ...

You often need data that are stored in separate tables. For example, you may want to produce a report that gets information about flight delays from one table and boarding capacity from another.

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 ...