Following are the difference between sql stored procedures and sql functions
| Stored Procedure | Functions |
| Can return 0 or multiple values | Function must return a value |
| SP can call functions | Functions can not call SPs |
| Allow SELECT + DML(INSERT/UPDATE/DELETE) | Allow SELECT operation only |
| Cant not be used in SELECT statements | Can be used in SELECT statements |
| Cant not be used in WHERE/HAVING clause | Can be used in WHERE/HAVING clause |
| SPs can have INPUT and/or OUTPUT parameters | Functions can have input parameters only |
| This is a precompiled set of statements, hence | Compile statements everytime. |
| Transactions can be created in SPs | Transactions can not be created |
| Allow TRY CATCH blocks | Does not allow exception handling |
