SQL: AND Condition

This SQL tutorial explains how to use the SQL AND condition with syntax and examples.

Description

The SQL AND condition (also known as the AND operator) is used to test for two or more conditions in a SELECT, INSERT, UPDATE, or DELETE statement. All conditions must be met for a record to be selected.

Syntax

The syntax for the AND condition in SQL is:

WHERE condition1
AND condition2
...
AND condition_n;

Parameters or Arguments

condition1, condition2, ... condition_n

Multiple conditions that will be tested for each record. All conditions must be met to be included in the result set.

DDL/DML for Examples

If you want to follow along with this tutorial, get the DDL to create the tables and the DML to populate the data. Then try the examples in your own database!

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Example - Using "AND" Condition with the SELECT Statement

Let's look at an example that shows how to use the AND condition in a SELECT statement to test for 2 conditions that must be met for the records to be selected.

In this example, we have a table called customers with the following data:

customer_id	last_name	first_name	favorite_website
4000	Jackson	Joe	google.com
5000	Smith	Jane	digminecraft.com
6000	Ferguson	Samantha	bigactivities.com
7000	Reynolds	Allen	checkyourmath.com
8000	Anderson	Paige	NULL
9000	Johnson	Derek	google.com

Now let's demonstrate how to use the AND condition. Enter the following SELECT statement:

SELECT *
FROM customers
WHERE favorite_website = 'google.com'
AND customer_id > 6000
ORDER BY last_name;

There will be 1 record selected. These are the results that you should see:

customer_id	last_name	first_name	favorite_website
9000	Johnson	Derek	google.com

This example would return all customers whose favorite_website is google.com and the customer_id is greater than 6000. Because the * is used in the SQL SELECT statement, all fields from the customers table would appear in the result set.

Example - Using "AND" Condition with the UPDATE Statement

Now, let's look at an example of how to use the AND condition in an UPDATE statement. This will test for multiple conditions to be met before a record is updated.

In this example, we have a table called suppliers with the following data:

supplier_id	supplier_name	city	state
100	Microsoft	Redmond	Washington
200	Google	Mountain View	California
300	Oracle	Redwood City	California
400	Kimberly-Clark	Irving	Texas
500	Tyson Foods	Springdale	Arkansas
600	SC Johnson	Racine	Wisconsin
700	Dole Food Company	Westlake Village	California
800	Flowers Foods	Thomasville	Georgia
900	Electronic Arts	Redwood City	California

Enter the following UPDATE statement:

UPDATE suppliers
SET supplier_name = 'TBD'
WHERE city = 'Redwood City'
AND supplier_id <> 900;

There will be 1 record updated. Select the data from the suppliers table again:

SELECT * FROM suppliers;

These are the results that you should see:

supplier_id	supplier_name	city	state
100	Microsoft	Redmond	Washington
200	Google	Mountain View	California
300	TBD	Redwood City	California
400	Kimberly-Clark	Irving	Texas
500	Tyson Foods	Springdale	Arkansas
600	SC Johnson	Racine	Wisconsin
700	Dole Food Company	Westlake Village	California
800	Flowers Foods	Thomasville	Georgia
900	Electronic Arts	Redwood City	California

This example would update all supplier_name values in the suppliers table to TBD where the city was Redwood City and the supplier_id was not equal to 900. As you can see, the supplier_name in the third row has been updated.

Example - Using "AND" Condition with the DELETE Statement

Next, let's see how to use the AND condition in the DELETE statement to test for 2 conditions to be met before a record is deleted.

In this example, we have a table called products with the following data:

product_id	product_name	category_id
1	Pear	50
2	Banana	50
3	Orange	50
4	Apple	50
5	Bread	75
6	Sliced Ham	25
7	Kleenex	NULL

Enter the following DELETE statement:

DELETE FROM products
WHERE category_id = 50
AND product_name <> 'Pear';

There will be 3 records deleted. Select the data from the products table again:

SELECT * FROM products;

These are the results that you should see:

product_id	product_name	category_id
1	Pear	50
5	Bread	75
6	Sliced Ham	25
7	Kleenex	NULL

This example would delete all records from the products table whose category_id is 50 and whose product_name is not Pear.