Sql cursor

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INSENSITIVE Defines a cursor that makes a temporary copy of the data to be used by the cursor. I know cursors exist but I am not sure how to use them. Can you provide some cursor examples?

Opening a cursor on a result set allows processing the result set one row at a time. You can assign a cursor to a variable or parameter with a cursor data type. The set of rows the cursor holds is referred to as the active set. First, declare two variables to hold product name and list price, and a cursor to hold the result of a query that selects product name and list price from the production. After reading this article you will understand what a database cursor is, see an example, and understand when to use them in a stored procedure.

The cursor name uniquely identifies a cursor , so it must be unlike that of any other cursor name in the current module or compilation unit. Relate it to the data that the query expression requests or to the operation that. An explicit cursor is an SELECT statement declared explicitly in the declaration section of the current block or a package specification. For an explicit cursor , you have the control over its execution cycle from OPEN, FETCH, and CLOSE.

SQL Server cursor example. A cursor is a set of rows together with a pointer that identifies a current row. It is a database object to retrieve data from a result set one row at a time.

The name of this context area is same as the cursor name. Open: In order to put that cursor to work, we have to open it first. Fetch: Fetching is the process of retrieving the data from the cursor.

Declare a cursor that defines a result set. Open the cursor to establish the result set. Fetch the data into local variables as needed from the cursor , one row at a time. Close the cursor when done. Let’s examine each step in greater detail.

I have a cursor containing several columns from the row it brings back that I would like to process at once. In order to replace this cursor with a WHILE LOOP, we need to create a temporary table to implement a tally table. It must conform to the rules for identifiers. INSENSITIVE: It is a cursor that makes a temporary copy of the data to be used by the cursor.

A cursor contains information on a select statement and the rows of data accessed by it. This temporary work area is used to store the data retrieved from the database, and manipulate this data. If you possess programming skills, you would probably use a loop like FOR or WHILE to iterate through one item at a time, do something with the data and the job is done. Because each time you call the FETCH statement, the cursor attempts to read the next row in the result set.

Let’s look at some examples of using the cursor FOR LOOP statement to see how it works. When the cursor reaches. The following example declares an explicit cursor and uses it in the cursor FOR LOOP statement.

Cursors have these properties:. Skills With The Power Of NoSQL. Have A Sales Or Partner Inquiry? Let Our Team Help You Now! Cloud And Manage Autonomously.

It contains all information needed for processing the statement. So make sure to subscribe to the channel. Description cursor -name Names the cursor. There may be times when you need to loop through a et a row at a time and perform a certain action for each row. Click me to see the solution.

You would use a CURSOR FOR LOOP when you want to fetch and process every record in a cursor. The CURSOR FOR LOOP will terminate when all of the records in the cursor have been fetched.