1) A cursor is the position indicator on a computer display screen where a user can enter text. In an operating system with a graphical user interface (GUI), the cursor is also a visible and moving pointer that the user controls with a mouse, touch pad, or similar input device.
What are cursor used for?
A cursor keeps track of the position in the result set, and allows you to perform multiple operations row by row against a result set, with or without returning to the original table. In other words, cursors conceptually return a result set based on tables within the databases.
Where is the cursor?
On the Devices screen, select Mouse in the left-hand column. Under Related settings in the right-hand panel, click Additional mouse options. In the Mouse Properties window, click the Pointer Options tab, and look under Visibility. Check the box next to Show location of pointer when I press the CTRL key.
What is cursor example?
Oracle creates a memory area, known as the context area, for processing an SQL statement, which contains all the information needed for processing the statement; for example, the number of rows processed, etc. A cursor is a pointer to this context area.
Is cursor a software?
A pointer editor is software for creating and editing static or animated mouse pointers. Pointer editors usually support both static and animated mouse cursors, but there are exceptions.
What does a cursor look like?
The text cursor is typically a straight vertical line or I-shaped object that flashes in a line of text. Typically, when you are typing a paper, the cursor will be at the end of the line, because you are adding new text to the uncharted white area of the page.
How do I create a cursor?
To work with cursors you must use the following SQL statements: DECLARE CURSOR. OPEN. FETCH.
Cursors in SQL procedures
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.
What is cursor and trigger?
A trigger is a procedure (code segment) that is executed automatically when some specific events occur in a table/view of a database, while a cursor is a control structure used in databases to go through the database records. A cursor can be declared and used within a trigger.
What are the types of cursor?
Types of cursors
STATIC CURSOR. A static cursor populates the result set during cursor creation and the query result is cached for the lifetime of the cursor. FAST_FORWARD. This is the default type of cursor. DYNAMIC. KEYSET.
What is the difference between pointer and cursor?
The mouse pointer is an arrow-like figure that appears on the screen of the computer. It is used to locate the different icons on the screen. It can move across the screen. The cursor, however, is a blinking line that appears whenever you type something on the computer.
What is a cursor on a laptop?
Share: A cursor is a moveable icon (generally moved with the mouse) that shows the user where any input into the computer will be placed or where an action will occur. For example, if the cursor is moved on the screen to a button in a program or application and the mouse left button is clicked, it will action.
What is the cursor text?
The screen pointer that appears when text can be highlighted or edited. The text cursor is a vertical line (|). Also called a “caret,” “i-cursor” or “I-beam,” it may or may not blink. If the cursor is an arrow or hand, the text cannot be highlighted or changed.
What is an open cursor?
The Open SQL statement OPEN CURSOR opens a database cursor for the result set of the main query defined after FOR and links a cursor variable dbcur with this database cursor. The results set of the main query can be read with the statement FETCH.
Can we declare cursor inside begin?
In general, yes you can, you just nest another execution block inside your current one
What is a cursor in Android?
Cursors are what contain the result set of a query made against a database in Android. The Cursor class has an API that allows an app to read (in a type-safe manner) the columns that were returned from the query as well as iterate over the rows of the result set.
What is Oracle cursor?
To execute a multi-row query, Oracle opens an unnamed work area that stores processing information. A cursor lets you name the work area, access the information, and process the rows individually. For more information, see “Querying Data with PL/SQL”.
What is hand cursor called?
It is also called a pointer, but today pointer refer to a specific cursor, the one that looks like a hand with an extended index finger.
Is cursor a thin blinking line?
Answer: The cursor is the blinking symbol on the computer screen.
