Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

For this example you create a view descriptor, VLIB.ALLEMP, based on SYBASE data. The outer PROC SQL query retrieves data from the view descriptor; the subquery uses a Pass-Through query to retrieve ...

Dino Esposito explains JSON-to-rowset native support in SQL Server 2016 and provides a realistic perspective of data query when you have JSON data stored in the database.

The following example invokes the SQL Query Window with two tables, SASUSER.FITNESS and SASUSER.CLASS, selected, and begins in the SQL Query Column window.

Joey on SQL Server Deep Dive into SQL Server 2022's Query Performance Features, Part 2: PSP Optimization Reduce workload times with this handy feature that can benefit every database pro.

Among them: altering the back-end query (specifically by reconsidering the use of concatenation) or limiting user-supplied input to avoid bad-faith language. Here are a few examples: Use parameterized ...

What does query by example actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

In R, the sqldf package lets you run SQL queries on an R data frame, and that’s what I’ll use in this example. There’s a similar sqldf library in Python.