SQL SELECT


David Haertzen David Haertzen, Tutorial Author
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SQL > SQL Basics > SQL SELECT Statement


What is the SQL SELECT Statement?

The SQL SELECT statement is the SQL command that retrieves data from an SQL database. This operation is also known as a query and is the key to the use of SQL for analysis and reporting. This tutorial section shows the basic SQL SELECT statement so see the SQL Advanced tutorial section for more in depth knowledge.

Why Use the SQL SELECT Statement?

Anytime you want to retrieve information from a SQL database use the SQL SELECT statement to request the information.

How To Use the SQL SELECT Statement

The SQL SELECT command is used as follows. The asterisk can be used to SELECT all columns of a table.

SQL SELECT Statement Syntax

 
SELECT <columnlist>
FROM <tablename>
 

SQL SELECT Statement Example 1

The following example retrieves the columns product_nbr and product_name from all rows of the product table.

 
SELECT product_nbr, product_name
FROM product
 

Results from the execution of the SQL SELECT statement, also known as a query are as follows:

product_nbrproduct_name
1001 SQL Tool 1.0
2001 SQL Tool 2.0 Light
2002 SQL Tool 2.0 Professional
2003 SQL Tool 2.0 Enterprise

SQL SELECT Statement Example 2

The following example retrieves all of the columns from all rows of the product table.

 
SELECT *
FROM product
 

Results show the product_status_code column that was not present in Example 1.

product_nbrproduct_nameproduct_status_code
1001 SQL Tool 1.0 Inactive
2001 SQL Tool 2.0 Light Active
2002 SQL Tool 2.0 Professional Active
2003 SQL Tool 2.0 Enterprise Active

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