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

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.

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 SAS System SQL procedure also enables you to retrieve and update CA-DATACOM/DB data. You can retrieve and browse the data by specifying a view descriptor in a PROC SQL SELECT statement.

The EXECUTE statement sends dynamic, non-query DBMS-specific SQL statements to the DBMS. The CONNECTION TO component in the FROM clause of a PROC SQL SELECT statement retrieves data directly from a ...

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 ...

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 ...