What is the purpose of using WHERE 1 1 in SQL statements

0 votes

Possible Duplicates:
Why would a sql query have “where 1 = 1”
Why would someone use WHERE 1=1 AND <conditions> in a SQL clause?

That is a common occurrence in various query instances, and it probably applies to all SQL engines.

People (and especially ORM frameworks) frequently add the always-true condition WHERE 1 = 1 or something similar to a query if there are no conditions declared for it.

So instead of:

SELECT id, name FROM users;

They use:

SELECT id, name FROM users WHERE 1 = 1;

The only reason I can think of for this is if you add conditions dynamically, in which case you don't have to worry about the initial AND being stripped, however, it still happens very frequently that the 1 = 1 condition is stripped if there is an actual condition in the query.

An actual example from CakePHP (generated by the framework):

(no conditions)

SELECT `User`.`id`, `User`.`login`
FROM `users` AS `User` WHERE 1 = 1 
ORDER BY `User`.`id` ASC;

(with the condition)

SELECT `User`.`id`, `User`.`login`
FROM `users` AS `User` 
WHERE `User`.`login` = 'me@example.com'
LIMIT 1;

Is there any reason for adding that extra condition?

Aug 28, 2022 in Database by Kithuzzz
• 38,010 points
1,777 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In Database

0 votes
0 answers

What is the purpose of Order By 1 in SQL select statement?

I discovered numerous views with an order ...READ MORE

Aug 19, 2022 in Database by Kithuzzz
• 38,010 points
543 views
0 votes
1 answer

What is the definition of cardinality in SQL?

Cardinality is defined as the "number of ...READ MORE

answered Feb 15, 2022 in Database by Neha
• 9,060 points
1,615 views
0 votes
1 answer

What is the difference between HAVING and WHERE in SQL?

HAVING: It is used to check after the aggregation ...READ MORE

answered Feb 17, 2022 in Database by Vaani
• 7,060 points
608 views
0 votes
0 answers

What is the definition of cardinality in SQL?

My book definition of Database Systems does ...READ MORE

Feb 18, 2022 in Database by Neha
• 9,060 points
636 views
0 votes
0 answers

What is the advantage of using "Set NOCOUNT ON" in stored procedure's which are used in ssis packages?

While studying SQL Server's performance tuning concepts, ...READ MORE

Aug 28, 2022 in Database by Kithuzzz
• 38,010 points
365 views
0 votes
1 answer

What is the use of a cursor in SQL Server?

Instead of receiving a result set as ...READ MORE

answered Sep 13, 2022 in Database by narikkadan
• 63,700 points
515 views
0 votes
1 answer

IN vs OR in the SQL WHERE Clause

I assume you want to know the ...READ MORE

answered Sep 24, 2018 in Database by DataKing99
• 8,240 points
3,444 views
0 votes
0 answers

How to use the where clause in R programming?

I'm trying to implement a where clause ...READ MORE

Dec 24, 2018 in Data Analytics by Sophie may
• 10,610 points
3,988 views
0 votes
1 answer

What is the rule to use group by, having and where clause?

Hi samar, this is a very common mistake ...READ MORE

answered Jul 2, 2019 in Database by anonymous
1,102 views
0 votes
1 answer

SQL Switch/Case in 'where' clause

Without a case statement: SELECT column1, ...READ MORE

answered Feb 7, 2022 in Database by Vaani
• 7,060 points
1,140 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP