IN Vs EXISTS Operators
| IN Operator | EXISTS Operator |
|---|---|
| IN can be used as a replacement for multiple OR operators. | To determine if any values are returned or not, we use EXISTS. |
| Faster execution as subquery executes only once. | Slower execution as EXISTS Operator forces the sub-query to execute again & again for each subsequent outer Query. |
| In the IN-condition SQL Engine compares all the values in the IN Clause. | Once true is evaluated in the EXISTS condition then the SQL Engine will stop the process of further matching. |
| Follow BOTTOM – UP Approach of execution. | Follow TOP-DOWN Approach of execution. |
| The IN operator cannot compare anything with NULL values. | The EXISTS clause can compare everything with NULLs. |
| A direct set of values can be given for comparison. | Cannot compare directly the values, a sub-query needs to be given. |
IN vs EXISTS in SQL
SQL stands for Structured Query Language. SQL is used for retrieving useful information from a large set of data and it is used for storing the data in the Database, modifying, or manipulating the data from the database.
In this article, we are going to discuss IN Operator and EXISTS Operator in SQL as well as the difference between these two operators in detail.