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).

If you only want to update values in table A when there are matching records in table B, then an inner join is the way to go. If you have calculations that need to vary based on optional data, the ...

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 ...

This join will be detected by the SQL Procedure and passed by the SAS/ACCESS engine directly to the DBMS server. The resulting rows will be passed back to the SAS System. proc sql; select tab1.deptno, ...