Learn how to use the LIKE operator in SQL to search for patterns with wildcards, combine multiple patterns, escape literal characters, and optimize your queries.

Technical documentation for Microsoft SQL Server, tools such as SQL Server Management Studio (SSMS) , SQL Server Data Tools (SSDT) etc. - MicrosoftDocs/sql-docs ...

Learn how to use the UNION operator in SQL, a set operation that combines the rows from two or more queries into one result set. Discover the benefits, limitations, and examples of using it.

Logical operators allow you to test whether a condition is true or false. Therefore, the result returned by a logical operator is either true, false, or NULL (unknown). You can think of a NULL result ...