What is cursor and ref cursor in Oracle?

What is 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 ref type in PL SQL?

A ref is a pointer to a record in a SQL (i.e. database) object table. Consequently Oracle supports them in SQL but not in PL/SQL.

What is ref cursor in SQL?

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.

What is a cursor in Oracle PL SQL?

A cursor is a pointer to this context area. PL/SQL controls the context area through a cursor. A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set.

What is the use of ref cursor?

What is ref cursor 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.

How do I run a ref cursor in Oracle?

With a cursor variable, you simply pass the reference to that cursor. To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR . The following shows an example of a strong REF CURSOR .

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.