What is the difference between cursor and ref cursor in Oracle?

What is the difference between cursor and ref cursor in Oracle?

A cursor is really any SQL statement that runs DML (select, insert, update, delete) on your database. A ref cursor is a pointer to a result set. This is normally used to open a query on the database server, then leave it up to the client to fetch the result it needs.

What is the ref cursor in Oracle?

A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. In essence, a REF CURSOR is a pointer or a handle to a result set on the database. REF CURSOR s are represented through the OracleRefCursor ODP.NET class.

What is cursor types of cursor and diff b W cursors?

Explicit Cursors. Implicit cursors are automatically created when select statements are executed. Explicit cursors needs to be defined explicitly by the user by providing a name. They are capable of fetching a single row at a time. Explicit cursors can fetch multiple rows.

Why cursor is used in Oracle?

Cursors are used when the user needs to update records in a singleton fashion or in a row by row manner, in a database table. The Data that is stored in the Cursor is called the Active Data Set. Oracle DBMS has another predefined area in the main memory Set, within which the cursors are opened.

What are the types of cursors in Oracle?

PL/SQL has two types of cursors: implicit cursors and explicit cursors.

What is a cursor variable?

A cursor variable is a cursor that contains a pointer to a query result set. A cursor variable, unlike a static cursor, is not associated with a particular query. The same cursor variable can be opened a number of times with separate OPEN FOR statements containing different queries.

What is an implicit cursor?

An implicit cursor has attributes that return information about the most recently run SELECT or DML statement that is not associated with a named cursor. Note: You can use cursor attributes only in procedural statements, not in SQL statements.

What are the types of cursor?

There are 2 types of Cursors: Implicit Cursors, and Explicit Cursors. These are explained as following below. Implicit Cursors: Implicit Cursors are also known as Default Cursors of SQL SERVER.

What is cursor type?

There are two main types of cursor data types: weakly-typed cursor data types and strongly-typed cursor data types. The property of being strongly or weakly typed is defined when the data type is created. This property is maintained in variables created of each type.

What is REFCURSOR in Oracle?

The REF CURSOR is a data type in the Oracle PL/SQL language. It represents a cursor or a result set in Oracle Database. The OracleRefCursor object is a corresponding ODP.NET type for the REF CURSOR type.

What is use of a cursor variable in Oracle?

Cursor variables can be used to hold different values at run time. They can be used to pass query result sets between PL/SQL stored subprograms. return_type is a record type indicating the types of the select list that will eventually be returned by the cursor variable.

What is cursor variables or REF CURSOR?

A cursor variable is a variable of REF CURSOR data type which is a pointer to a data structure resource. It connects to query statement result, similar to the CURSOR data type.

What is Oracle SQL cursor?

The Cursor is a handle (name or a pointer) for the memory associated with a specific statement. A cursor is basically an Area alocated by Oracle for executing the Sql Statements. Oracle Uses an Implicit Cursor statement for a single row query and Explicit Cursor for a multi row query.