Example 1: Retrieving Results from Specific Column Using IN Clause
Suppose you want to retrieve information about students who belong to the grades ‘A’ or ‘B’. The IN clause simplifies this query:
SELECT student_id, student_name, grade
FROM students
WHERE grade IN ('A', 'B');
The result Looks Like:
Explanation: This query efficiently selects students whose grades match either ‘A’ or ‘B’. The IN clause makes the condition concise and readable.
SQL Server IN Operator
IN clause in SQL Server is a logical operator to check a list of values, if available in a specific table column. This keyword helps in filtering data from the query results, based on a set of values. Using this IN clause we can specify multiple values in a WHERE clause, making your queries more readable and efficient. The IN clause can be used as a replacement for multiple OR conditions in a query.
In this article, we will understand the IN clause in detail with its syntax, usage, and benefits with examples to illustrate its functionality.
Syntax:
SELECT column_name1, column_name2, ...
FROM table_name
WHERE column_name IN (value1, value2, ...);
- SELECT: Specifies the column names that we want in our result.
- FROM: Indicates the table from which we are querying the data to retrieve the result set.
- WHERE: Filters the rows based on a specified condition.
- column_name: Specifies the column that we want to filter.
- IN: The keyword used to specify a list of values.