Stored Procedures and UDF

Stored procedures and UDFs are two types of server-side programming constructs in SQL that can perform different tasks and operations. Stored procedures are blocks of code that can execute one or more SQL statements and can be invoked by applications or other stored procedures. UDFs are functions that can return a single value or a table of values and can be used in SQL queries or expressions.

Some of the main differences between stored procedures and UDFs are:

- Stored procedures can accept any statements as well as DML statements, such as INSERT, UPDATE, or DELETE, while UDFs can only accept SELECT statements.
- Stored procedures can have both input and output parameters, while UDFs can only have input parameters.
- Stored procedures can use catch blocks to handle errors, while UDFs cannot use catch blocks.
- Stored procedures can use transactions to ensure data consistency, while UDFs cannot use transactions.
- Stored procedures cannot be used in join clauses, while UDFs can be used in join clauses.

Depending on the purpose and requirements of the application, stored procedures and UDFs can be chosen to write server-side logic in SQL.

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