The difference between in and or in sql

The IN operator in SQL checks whether a value belongs to a specified set of values, while the OR operator joins conditions and returns a True/False Boolean value. The IN operator uses parentheses to contain a list of values, while the OR operator joins conditions using the OR keyword.

The difference between IN and OR in SQL

In SQL, IN and OR are two different operations symbols, with different uses and semantics.

IN operator

• is used to check whether a value belongs to a specified set of values.
• Syntax: column_name IN (value1, value2, ...)
• Returns True when one of the specified values ​​matches the column value, otherwise returns False.
• Commonly used to query records that meet specific conditions.

OR operator

• is used to join two or more conditions.
• Syntax: condition1 OR condition2 OR...
• When any condition is True, return True, otherwise return False.
• Commonly used to query records that meet one of multiple conditions.

Difference

• Purpose: IN operator checks whether a value belongs to a set of values, while OR operator joins conditions .
• Semantics: IN operator returns True/False value, while OR operator returns True/False boolean value.
• Syntax: The IN operator uses parentheses to contain a list of values, while the OR operator uses the OR keyword to join conditions.

Example

<code class="sql">-- 使用 IN 运算符
SELECT * FROM table_name
WHERE column_name IN (1, 2, 3);

-- 使用 OR 运算符
SELECT * FROM table_name
WHERE column_name > 10 OR column_name < 5;</code>

In the first example, the IN operator checks whether column_name is equal to 1, 2, or 3. In the second example, the OR operator checks whether column_name is greater than 10 or less than 5.

The above is the detailed content of The difference between in and or in sql. For more information, please follow other related articles on the PHP Chinese website!