Can we use cursor in SQL function?

SQL Server supports three functions that can help you while working with cursors: @@FETCH_STATUS, @@CURSOR_ROWS, and CURSOR_STATUS. Cursor functions are non-deterministic. In order to understand how cursor functions work, you must first be familiar with the cursor’s life cycle.

What is cursor in SQL with example?

A SQL Server cursor is a set of T-SQL logic to loop over a predetermined number of rows one at a time. The purpose for the cursor may be to update one row at a time or perform an administrative process such as SQL Server database backups in a sequential manner.

What is the use of cursor?

Cursors are used by database programmers to process individual rows returned by database system queries. Cursors enable manipulation of whole result sets at once. In this scenario, a cursor enables the sequential processing of rows in a result set.

What is the cursor life cycle?

SQL Cursor Life Cycle A cursor is declared by defining the SQL statement. A cursor is opened for storing data retrieved from the result set. When a cursor is opened, rows can be fetched from the cursor one by one or in a block to do data manipulation. The cursor should be closed explicitly after data manipulation.

What are cursor types?

There are 2 types of Cursors: Implicit Cursors, and Explicit Cursors. These are explained as following below….What is Cursor in SQL?

• Declare Cursor Object.
• Open Cursor Connection.
• Fetch Data from cursor.
• Close cursor connection.
• Deallocate cursor memory.

How do you create a cursor in SQL?

Follow these steps to create a cursor: Associate a cursor with a resultSet of a T-SQL statement, and define the characteristics of the cursor, such as how the rows are going to be retrieved, and so forth. Execute the T-SQL statement to populate the cursor. Retrieve the rows in the cursor.

What is Oracle SQL cursor?

The Cursor is a handle (name or a pointer) for the memory associated with a specific statement. A cursor is basically an Area alocated by Oracle for executing the Sql Statements. Oracle Uses an Implicit Cursor statement for a single row query and Explicit Cursor for a multi row query.

What is the cursor variable in SQL?

Cursor variables (PL/SQL) A cursor variable is a cursor that contains a pointer to a query result set . The result set is determined by execution of the OPEN FOR statement using the cursor variable. A cursor variable, unlike a static cursor, is not associated with a particular query.

What is Oracle cursor?

Oracle Cursor. A cursor is a pointer to a private SQL area that stores information about the processing of a SELECT or DML statements like INSERT, UPDATE, DELETE or MERGE.