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OR - MySQL Conditions

In MySQL, the OR condition is used to combine multiple conditions in a WHERE clause. In this tutorial, we'll discuss the syntax and usage of the OR condition.

Syntax

The basic syntax of an OR condition in the WHERE clause is:

SELECT column1, column2, ...
FROM table_name
WHERE condition1 OR condition2 ...;

The OR condition allows us to retrieve rows that match either of the two conditions.

Example

Let's say we have a table called "products" and we want to retrieve all products that are either from the category "Electronics" or have a price greater than $500. Here's how we can implement it using the OR condition:

SELECT *
FROM products
WHERE category = 'Electronics' OR price > 500;

Output

When we run the example code above, the output will be all rows from the products table that match either of the two conditions.

Explanation

In the example above, we used the OR condition in the WHERE clause to retrieve rows from the products table. The condition matches all products that are either from the category "Electronics" or have a price greater than $500.

Use

The OR condition is useful when we want to retrieve rows that match either of the multiple conditions. It allows us to create complex queries that can filter data based on various conditions.

Important Points

  • The OR condition can be used with any number of conditions.
  • The use of parentheses can change the order of evaluation of the OR condition.
  • Using indexes can improve the performance of OR conditions.

Summary

In this tutorial, we discussed the syntax and usage of the OR condition in MySQL. We covered an example, output, explanation, use, and important points of the OR condition. With this knowledge, you can now use the OR condition in the WHERE clause of your MySQL queries to retrieve rows based on multiple conditions.

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