Do you ever find yourself juggling queries to get the information you need? Subselects, also called subqueries, may be just what you’ve been looking for. This SQL feature allows you to query ...

MongoDB supports a rich query language ; in fact, its support of dynamic queries is one of its more distinguishing features compared to other datastores in the NoSQL world.

The EXISTS condition is an operator whose right operand is a subquery. The result of an EXISTS condition is true if the subquery resolves to at least one row. The result of a NOT EXISTS condition is ...

If your business uses relational databases to store data, it helps to use the SQL SELECT command with the INTO clause to create new tables from query results. This method isn't ANSI-standard SQL ...

One of the most common problems when running SQL Servers is slow queries. The help desk or database team usually hears that described as the application is slow or the database is slow. In the ...

One of the most common problems when running SQL Servers is slow queries. The help desk or database team usually hears that described as the application is slow or the database is slow. In the ...