SQL SELECT Statement SELECT IN

The SQL SELECT statement SELECT IN allows you to filter data from a table based on a set of values. It works like an IN clause in SQL, where it selects rows that match any value in a specified list.

Syntax

The basic syntax for the SELECT IN statement is as follows:

SELECT column_name(s)
FROM table_name
WHERE column_name IN (value1, value2, value3, ...);

Example

Suppose we have a table called employees with columns id, name, department, and salary. We want to retrieve the names and salaries of all employees who work in the departments 'Sales' or 'Marketing'. We can use the SELECT IN statement as follows:

SELECT name, salary
FROM employees
WHERE department IN ('Sales', 'Marketing');

Output

The above SQL query will return a table with two columns: name and salary. It will only display the rows where the department column matches 'Sales' or 'Marketing'.

name	salary
John Doe	50000
Jane Doe	60000
Bob Smith	55000
Jill Lee	65000

Explanation

The SELECT IN statement is used to filter data from a table based on a set of values. It works like an IN clause, where it selects rows that match any value in a specified list.

In our example, we are retrieving the names and salaries of all employees who work in the departments 'Sales' or 'Marketing'. We specify the columns we want to retrieve in the SELECT clause, and use the IN keyword in the WHERE clause to filter the rows based on the departments.

Use

The SELECT IN statement can be used to filter data from a table based on a specified list of values. It is useful when you want to retrieve rows that match any value in a given list.

Some common use cases for the SELECT IN statement include:

• Filtering data based on a list of IDs.
• Retrieving rows that match any value in a set of categories.
• Selecting data from a table based on a list of dates or time periods.

Important Points

Here are some important points to keep in mind when using the SELECT IN statement:

• The IN keyword can be used with any data type that can be compared using =. This includes strings, numbers, and dates.
• You can specify as many values as you like in the list, separated by a comma.
• The SELECT IN statement can be combined with other SQL keywords, such as LIKE, BETWEEN, and NOT.

Summary

The SELECT IN statement is a powerful SQL filter that allows you to retrieve data from a table based on a set of values. You can specify any number of values in the list, and filter rows based on any column that can be compared using =. The SELECT IN statement can be used on its own, or in combination with other SQL keywords to create complex queries.