Please visit our sponsors !
SQL Select Statement
The SELECT statement selects columns of data from a database.
The tabular result is stored in a result table (called the
result set).
The SELECT Statement
The SELECT statement selects columns of data from a database.
Use it to SELECT information FROM a table like this:
SELECT column_name(s) FROM table_name
|
Example: Select Columns from a Table
To select the columns named "LastName" and "FirstName", use
a SELECT
statement like this:
SELECT LastName,FirstName FROM Persons
|
The "Persons" table:
LastName |
FirstName |
Address |
City |
Hansen |
Ola |
Timoteivn 10 |
Sandnes |
Svendson |
Tove |
Borgvn 23 |
Sandnes |
Pettersen |
Kari |
Storgt 20 |
Stavanger |
The result:
LastName |
FirstName |
Hansen |
Ola |
Svendson |
Tove |
Pettersen |
Kari |
Example: Select all Columns
To select all columns from the "Persons" table, use a * symbol
instead of column name like
this:
The result:
LastName |
FirstName |
Address |
City |
Hansen |
Ola |
Timoteivn 10 |
Sandnes |
Svendson |
Tove |
Borgvn 23 |
Sandnes |
Pettersen |
Kari |
Storgt 20 |
Stavanger |
The Result Table
The result from a SQL query is stored in a result set. The result set can be
thought of as a result table. Most database software allow navigation of the
result set with programming functions like: Move-To-First-Record,
Get-Record-Content, Move-To-Next-Record......
Programming functions like these are not a part of this tutorial.
If you want to learn more about accessing SQL data with function calls, study
our ADO tutorial.
Semicolon after SQL Statements?
Many SQL tutorials insist that you should always end an SQL statement with a
semicolon.
That is not correct. But semicolon is a standard way to end an SQL statement
(and to separate different SQL statements) in systems that allow more than one
SQL statement to be executed in the same call to a database server.
Jump to: Top of Page
or HOME or
Printer friendly page
Search W3Schools:
What Others Say About Us
Does the world know about us? Check out these places:
Dogpile
Alta Vista
MSN
Google
Excite
Lycos
Yahoo
Ask Jeeves
We Help You For Free. You Can Help Us!
W3Schools is for training only. We do not warrant its correctness or its fitness for use.
The risk of using it remains entirely with the user. While using this site, you agree to have read and accepted our
terms of use and
privacy policy.
Copyright 1999-2002 by Refsnes Data. All Rights Reserved
|