SQL is the language of databases, and we’ve reviewed the most basic command statements used in data queries. There are a number of basic concepts that weren’t covered, such as SUM and COUNT ...

Using 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 to combine results from multiple tables.

These books cover everything from beginner SQL queries to advanced database architecture.Perfect for developers, data ...

Basic SQL queries have a fairly simple structure. For example, a call to search for a particular order might look like. SELECT * FROM orders WHERE orderid=1234.

As we saw in the last article, the SQL SELECT statement has the widest variety of query options, which are used to control the way data is returned. These options come in the form of clauses ...

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 ...

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: / ...