What is difference between cursor and Storedprocedure?
A function or procedure is a set of instructions to perform some task. A cursor is an array that can stores the result set of a query. Stored procedures are pre-compiled objects and executes as bulk of statements, whereas cursors are used to execute row by row.
What is set based operations?
This means that operations in SQL Server are performed on a complete set of rows and returns a subset of the rows it manipulated. Furthermore, if T-SQL is designed for set manipulation, we could expect performance improvement using this « set-based » approach.
What is the difference between a view and a cursor?
View is a database object similar to table so it can be used with both SQL and PL/SQL. Cursor is defined and used within the block of stored procedure which means it can be only used with PL/SQL.
What are the two types of cursor?
There are 2 types of Cursors: Implicit Cursors, and Explicit Cursors.
Why do we use 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 cursor in procedure?
In SQL procedures, a cursor make it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. A cursor can be viewed as a pointer to one row in a set of rows. The cursor can only reference one row at a time, but can move to other rows of the result set as needed.
What is set based approach?
Set-Based Design (SBD) is a practice that keeps requirements and design options flexible for as long as possible during the development process. Instead of choosing a single point solution upfront, SBD identifies and simultaneously explores multiple options, eliminating poorer choices over time.
What is set based programming?
Set theoretic programming is a programming paradigm based on mathematical set theory. One example of a programming language based on this paradigm is SETL. The goal of set theoretic programming is to improve programmer speed and productivity significantly, and also enhance program clarity and readability.
What is the purpose of a cursor?
Use of Cursor The major function of a cursor is to retrieve data, one row at a time, from a result set, unlike the SQL commands which operate on all the rows in the result set at one time.
What is index and cursor?
A cursor is basically used to solve complex logic and works on a row by row manner. Index, on the other hand, has the main function of retrieving data from tables much quicker. This enables the user to get information quickly from the table and can be created on a single column or even a group.