Why do we use cursors in sql

We have to think at set-based operations rather than one row at a time to get the data we need. Cursors could be used in some applications for serialized operations as shown in example above, but generally they should be avoided because they bring a negative impact on performance, especially when operating on a large sets of data.

USE AdventureWorks OPEN cursorT. ProductInventory as pinv. Product as pp. ON pinv. WHERE pp. Author Recent Posts. Sergiu Onet. I have a bachelor degree in computer engineering and also posses skills in. Introduction : In this article you will learn the following:. Read the article " What is Cursor and use of cursor with example " to get the answer.

Why and When to use Cursor? There are some conditions when we want to get record from one table and need to insert into another with performing some logic or some conditions. Advantages of using Cursor:. Cursor Example:. Implementation : Let's create the cursor to check its working. For this we can create a cursor that will fetch the records one by one and calculate the discount and the discounted price and get all the details that we can display on any data control like GridView, Repeater, DataList etc.

Let's create a cursor. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. The cursors are slower because they update tables row by row. The following example explains the replacement of cursors through joins.

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