Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...

We list the best SQL online courses, to make it simple and easy to learn how to mange, code, and run databases, covering everything from beginner to advanced users. The Structured Query Language ...

In May 1974, Donald Chamberlin and Raymond Boyce published a paper on SEQUEL, a structured query language ... to large quantities of SQL code as part of their training. However, while this ...

Read this SQL tutorial to learn when to use SELECT ... A simple SELECT statement is the most basic way to query multiple tables. You can call more than one table in the statement’s FROM clause ...

In part 1 of my SQL Server 2022 features series, you learned about the improvements to the cardinality estimator component of query optimization. In this installment, you will learn about another ...

That capability is enhanced in SQL Server 2016, the first-ever version that lets developers query within JSON strings as if the JSON were organized into individual columns. What's more, you can read ...

Such is the case with SQL queries. They seem so innocent, and so useful. But dangers lurk within every space-separated keyword. Consider a basic query crafted using ordinary C# string concatenation: / ...