Oracle PL/SQL Explicit Cursors Quiz

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What is the purpose of defining explicit cursors in Oracle?

To control the execution when dealing with multiple records

What happens when a cursor is declared in Oracle?

A select statement is associated with the cursor

What is generated in memory when a cursor is opened in Oracle?

An active set of records from the associated select statement

When can records be retrieved from an active cursor in Oracle?

After the cursor is opened

What is the role of fetch operation in Oracle cursors?

To retrieve records from the active set

What is the purpose of declaring an explicit cursor in Oracle?

To control the execution when dealing with multiple records

What is the initial step when declaring an explicit cursor in Oracle?

Associate a select statement with the cursor

What happens when a cursor is opened in Oracle?

The select statement associated with the cursor is executed

What is the purpose of the fetch operation in Oracle cursors?

To retrieve records from the active set generated by the cursor

What is the role of the active set in Oracle cursors?

It contains the results of the execution of the select statement associated with the cursor

Study Notes

Summary of "Explicit Cursors in Database Management"

  • Explicit cursors are used to control the execution when dealing with multiple records in a database.
  • When declaring a cursor, it is associated with a select statement to retrieve records.
  • The select statement associated with the cursor is not executed when the cursor is declared, but an active set is generated in the memory.
  • The active set contains the results of the select statement execution and is used for fetch operations.
  • After declaring and associating a select statement with the cursor, the cursor can be manipulated to retrieve records from the associated select statement.
  • The fetch operation is used to retrieve records from the active set associated with the cursor.
  • The explicit cursor allows for precise control over record retrieval and manipulation in database management.
  • It is necessary to define explicit cursors to manage the execution of multiple records effectively.
  • The active set generated in the memory contains the results that need to be retrieved through fetch operations.
  • The cursor is opened to access the active set and retrieve records from the associated select statement.
  • The steps involved in working with explicit cursors include declaration, association with a select statement, manipulation, and fetch operations.
  • The explicit cursor provides a mechanism for efficient and controlled handling of multiple records in database management.

Test your knowledge of explicit cursors in Oracle PL/SQL with this quiz. Explore the steps involved in defining and using explicit cursors, and enhance your understanding of controlling the execution when dealing with multiple records.

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