Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

The 'New SQL Requirement' function of Feisuan JavaAI, based on powerful natural language processing and SQL syntax parsing ...

Because no software developer is complete without at least a passing knowledge of the world’s most popular query language If yo were raised on MongoDB or learned full stack development in a coding ...

Dynamic SQL lets you create a query string based off of user input. SQL Server allows you to create dynamic SQL statements. The statements use a SQL string varchar data type, then you execute the ...

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JSON has stolen some of XML's thunder with features such as human and machine readability, a lightweight, compact text structure and support for many software and hardware platforms. JSON (JavaScript ...

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution SQL: old and busted. Hadoop: new hotness. That’s the conventional ...

The beauty and joy of a relational database is the concept of relational closure—everything is a table. Beyond the eponymous table, query results are also “tables.” Any query serves as a table to be ...

With each new release, SQL Server gets easier to manage. That doesn’t mean the product is growing simpler, however. To make upgrading a compelling prospect, Microsoft naturally introduces new features ...