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sql works based on set e.g., select statement returns a set of rows which is called a result set. however, sometimes, you may want to process a data set on a row by row basis. this is where cursors come into play. a database cursor is an object that enables traversal over the rows of a result set. it allows you to process individual row returned by a query. to declare a cursor, you specify its name after the declare keyword with the cursor data type and provide a select statement that defines the result set for the cursor. sql server provides the @@fetchstatus function that returns the status of the last cursor fetch statement executed against the cursor; if @@fetchstatus returns 0, meaning the fetch statement was successful. you can use the while statement to fetch all rows from the cursor as shown in the following code: first, declare two variables to hold product name and list price, and a cursor to hold the result of a query that retrieves product name and list price from the production.products table:
in this tutorial, you will learn how to use the sql server cursor to process a result set, one table from the sample database to show you how to use a cursor:. – static cursors may detect their own updates, deletes, and inserts, although they are not required to do so. for example, suppose a static cursor – here is an example sql server cursor from this tip simple script to backup the purpose for the cursor may be to update one row at a time or , cursor in sql server w3schools, cursor in sql server w3schools, sql server cursor for update, types of cursor in sql server, cursor in sql example with stored procedure.
this lets sql server take a single set of quick locks on exactly the rows it needs, perform a quick update, and then get out. for an example, check out this stack – in sql server the cursor is a tool that is used to iterate over a result set, or to loop the example shown was run on sql server 2008, and works the same on sql thanks for the feedback, i will update the original post. – for example, a select statement returns a set of rows which is called a result set. sometimes the application logic needs to work with a row at a , sql server cursor example multiple columns, sql cursor alternative, sql cursor alternative, cursor in sql server%3F – stack overflow, nested cursor in sql server
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