Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

The outer PROC SQL query retrieves data from the view descriptor; the subquery uses a Pass-Through query to retrieve data. This query returns the names of employees who earn less than the average ...

I hope this is the right place for this type of question. I apologize for the question length but to try and be complete I'll include a bit of background.I am currently working on a project ...

SQL SELECT statement The SELECT statement tells the query optimizer what data to return, what tables to look in, what relations to follow, and what order to impose on the returned data.

When using the SQL procedure, note that the data are displayed in the SAS OUTPUT window. The procedure displays output data automatically without using the PRINT procedure and executes without using ...

Hi I need some help with a select statement in MS SQL. I have a table that need to check if there duplicate items there. The problem is that each items is based off of 4 fields in the table. Here ...

The following T-SQL query shows how to select only the countries that count more than 100 million inhabitants. The query mixes regular table columns and JSON properties: SELECT CountryCode, ...

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 ...

A new SQL Server 2025 feature lets organizations run vector-based semantic searches on their own data, connecting to local or ...

Assuring optimal performance of database applications starts with coding properly formulated SQL. Poorly written SQL and application code is the cause of most performance problems. As much as 75% of ...