In response to previous SQL lessons, TechRepublic members including Michael M. and Jason P. have posted comments requesting a basic explanation of the types of JOINs available in SQL.. If you use ...

Use SQL joins in PostgreSQL. At this point, we are going to create and run a query against multiple tables using join clauses, almost always inner join clauses (the default).

In earlier versions of SQL Server, after selecting a join algorithm, SQL Server had to process it even if a better alternative might be available. In SQL Server 2017, the query optimizer can now sense ...