OR - (PostgreSQL Conditions)

In PostgreSQL, OR is a logical operator that is used to combine two or more conditions. The OR operator returns true if any of the conditions it connects are true. In this tutorial, we'll show you how to use the OR operator in PostgreSQL.

Syntax

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

Example

Let's take a look at a simple example that uses the OR operator:

SELECT *
FROM users
WHERE name = 'John' OR age > 30;

In this example, we select all rows from the users table where either the name column is 'John' or the age column is greater than 30.

Output

The output of the query above will be a set of rows from the users table that match the conditions specified in the WHERE clause.

Explanation

In the example above, we used the OR operator to combine two conditions. The first condition is name = 'John' and checks to see if the value of the name column is equal to 'John'. The second condition is age > 30 and checks to see if the value of the age column is greater than 30.

The OR operator returns true if either of these conditions is true. So the query returns all rows from the users table where the name column is 'John' or the age column is greater than 30.

Use

The OR operator is useful when you want to filter data based on multiple conditions. With OR, you can select data that matches any of the conditions you specify.

Important Points

• When using OR, it's important to use parentheses to group the conditions properly.
• OR has a lower precedence than AND, so if you use both AND and OR in the same query, it's important to use parentheses to ensure that the conditions are grouped correctly.

Summary

In this tutorial, we showed you how to use the OR operator in PostgreSQL. We discussed the syntax, example, output, explanation, use, and important points of using the OR operator. With this knowledge, you can now use the OR operator to filter data based on multiple conditions in your PostgreSQL queries.