in command in SQL

Question

What is the use of in command in SQL.

nallya · Answer

The IN function helps reduce the need to use multiple OR conditions. The syntax for the IN function is: SELECT columns FROM tables WHERE column1 in (value1, value2, .... value_n); This SQL statement will return the records where column1 is value1, value2..., or value_n. The IN function can be used in any valid SQL statement - select, insert, update, or delete. Example #1: The following is an SQL statement that uses the IN function: SELECT * FROM suppliers WHERE supplier_name in ( 'IBM', 'Hewlett Packard', 'Microsoft'); This would return all rows where the supplier_name is either IBM, Hewlett Packard, or Microsoft. Because the * is used in the select, all fields from the suppliers table would appear in the result set. It is equivalent to the following statement: SELECT * FROM suppliers WHERE supplier_name = 'IBM' OR supplier_name = 'Hewlett Packard' OR supplier_name = 'Microsoft'; As you can see, using the IN function makes the statement easier to read and more efficient. Example #2: You can also use the IN function with numeric values. SELECT * FROM orders WHERE order_id in (10000, 10001, 10003, 10005); This SQL statement would return all orders where the order_id is either 10000, 10001, 10003, or 10005. It is equivalent to the following statement: SELECT * FROM orders WHERE order_id = 10000 OR order_id = 10001 OR order_id = 10003 OR order_id = 10005; Example #3 - using "NOT IN": The IN function can also be combined with the NOT operator. For example, SELECT * FROM suppliers WHERE supplier_name not in ( 'IBM', 'Hewlett Packard', 'Microsoft'); This would return all rows where the supplier_name is neither IBM, Hewlett Packard, or Microsoft. Sometimes, it is more efficient to list the values that you do not want, as opposed to the values that you do want.

Satyapriya Nayak · Answer

Hi Sharad, The IN operator allows you to specify multiple values in a WHERE clause. SQL IN Syntax SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,...) IN Operator Example The "Persons" table: P_Id LastName FirstName Address City 1 Hansen Ola Timoteivn 10 Sandnes 2 Svendson Tove Borgvn 23 Sandnes 3 Pettersen Kari Storgt 20 Stavanger Now we want to select the persons with a last name equal to "Hansen" or "Pettersen" from the table above. We use the following SELECT statement: SELECT * FROM Persons WHERE LastName IN ('Hansen','Pettersen') The result-set will look like this: P_Id LastName FirstName Address City 1 Hansen Ola Timoteivn 10 Sandnes 3 Pettersen Kari Storgt 20 Stavanger Please refer the below link http://www.w3schools.com/sql/sql_in.asp Thanks

Sukesh Marla · Answer

IN operator allows you to specify multiple values in a WHERE clause. SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,...) Check this is correct answer if it helped.