Category: SQL

SQL User-Defined Functions (UDFs) are custom functions created by users to perform specific tasks within a relational database management system (RDBMS). These functions encapsulate a set of SQL statements, allowing users to execute complex operations, calculations, or data manipulations with a single function call. SQL UDFs enhance the modularity, readability, and reusability of code within…(Continue Reading)

The SQL ALTER FUNCTION statement is used to modify an existing user-defined function in a database. Functions in SQL are named, reusable blocks of code that perform a specific task. They can be created using the CREATE FUNCTION statement, and when the need arises to change their behavior or structure, the ALTER FUNCTION statement comes…(Continue Reading)

The SQL CREATE FUNCTION statement is used to define a new user-defined function (UDF) in a database. A function in SQL is a set of SQL statements that perform a specific task and return a single value. Functions help in encapsulating a set of logic that can be reused in various parts of SQL queries,…(Continue Reading)

In SQL, the ALTER PROCEDURE statement is used to modify an existing stored procedure. A stored procedure is a precompiled collection of one or more SQL statements that can be executed as a single unit. Modifying a stored procedure can be necessary to update its functionality, improve performance, or accommodate changes in the database schema.…(Continue Reading)

A stored procedure in SQL is a precompiled collection of one or more SQL statements that are stored and can be executed as a single unit. It is typically used to encapsulate a set of operations or business logic that can be reused across different parts of an application or by multiple users. Stored procedures…(Continue Reading)

In SQL, a stored procedure is a precompiled collection of one or more SQL statements that perform a specific task. The CREATE PROCEDURE statement is used to define and create stored procedures in a database. Here’s an overview of the SQL CREATE PROCEDURE syntax and its key components: Syntax CREATE PROCEDURE procedure_name [parameter1 datatype1, parameter2…(Continue Reading)

In SQL, a trigger is a set of instructions that are automatically executed or fired in response to certain events on a particular table or view. The ALTER TRIGGER statement is used to modify an existing trigger in a database. Triggers are commonly used to enforce business rules, maintain referential integrity, or perform other automated…(Continue Reading)

In SQL, the ALTER VIEW statement is used to modify an existing view in a database. A view in SQL is a virtual table that is based on the result of a SELECT query. It does not store the data itself but provides a way to represent the data from one or more tables in…(Continue Reading)

The SET TRANSACTION statement in SQL is used to configure properties for a transaction. Transactions in a relational database management system (RDBMS) ensure the consistency and integrity of the data by allowing a series of SQL statements to be treated as a single unit of work. The SET TRANSACTION statement provides a way to customize…(Continue Reading)

In SQL, a SAVEPOINT is a mechanism that allows you to create a point within a transaction to which you can later roll back. This feature is particularly useful when you want to implement a partial rollback in case of errors or other exceptional conditions within a transaction. Why Use SAVEPOINT? Nested Transactions SAVEPOINT allows…(Continue Reading)