Why cursors in oracle

You retrieve data from a cursor by opening it, then fetching from it. The scope of cursor parameters is local to the cursor, meaning that they can be referenced only within the query used in the cursor declaration. The values of cursor parameters are used by the associated query when the cursor is opened. The datatype of a cursor parameter must be specified without constraints, that is, without precision and scale for numbers, and without length for strings. Cursors To execute a multi-row query, Oracle opens an unnamed work area that stores processing information.

Book List. Master Index. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy. Cursor in Oracle By Priya Pedamkar. Popular Course in this category. Course Price View Course. Free Data Science Course. Login details for this Free course will be emailed to you. Email ID. Contact No. Programmers cannot control the implicit cursors and the information in it.

Explicit cursors are programmer-defined cursors for gaining more control over the context area. Opening the cursor allocates the memory for the cursor and makes it ready for fetching the rows returned by the SQL statement into it. Fetching the cursor involves accessing one row at a time. Cursors are the temporary private working area where queries are processed.

Implicit Cursors and Explicit Cursors are two types of Cursors. This article introduces the term "Cursors" in Oracle. Cursors In Oracle, Cursors are the temporary private working area where queries are processed. It is used to access the result set present in memory. A cursor contains the information on a select statement and the rows of the data accessed by it. Features of Cursors Cursors consist of the following two features: It allows us to fetch and process rows returned by the select statement.