Oracle Database Cursors Basics Quiz

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What does a cursor serve as in the context of an Oracle database?

A pointer to the Process Global Area (PGA)

A placeholder for data retrieval

A pointer to a memory area known as the context area (correct)

A storage location for SQL or DML statements

What kind of information does the context area, pointed to by a cursor, hold?

Statistics on database performance

Metadata about database objects

Information about user privileges

Vital information about the processing of SQL or DML statements (correct)

Where is the context area, to which a cursor points, located?

In the Program Global Area (PGA)

Within the SQL buffer

In the System Global Area (SGA)

Inside the Process Global Area (PGA) (correct)

What type of information does the context area within the PGA hold?

Rows returned by a query Signup and view all the answers

What does the context area assist the Oracle server in processing?

SQL statements Signup and view all the answers

What type of information does the context area within the PGA hold?

Rows returned by a query Signup and view all the answers

What does the context area assist the Oracle server in processing?

SQL statements Signup and view all the answers

What does a pointer within the context area in the PGA refer to?

The parsed query in the shared pool Signup and view all the answers

What type of cursors are automatically created by the Oracle server when an SQL DML statement is executed?

Implicit Cursors Signup and view all the answers

Where are implicit cursors created in the Oracle database?

Automatically by the Oracle server Signup and view all the answers

For which type of statements must users create explicit cursors in Oracle database?

Statements that return more than one row of data Signup and view all the answers

What is the first step in creating an explicit cursor in PL/SQL?

Declare the cursor in the declaration section Signup and view all the answers

Where is the explicit cursor associated with a SELECT statement initialized?

Declaration section Signup and view all the answers

What does declaring an explicit cursor involve in PL/SQL?

Initializing a cursor into memory and associating it with a SELECT statement Signup and view all the answers

How is a cursor declared in PL/SQL?

CURSOR cursor_name IS select_statement; Signup and view all the answers

What does declaring a cursor involve in PL/SQL?

Specifying the SQL SELECT statement that the cursor will hold Signup and view all the answers

How is data retrieved from a cursor in PL/SQL?

FETCH cursor_name INTO PL/SQL variable; Signup and view all the answers

What happens once a cursor is declared and opened in PL/SQL?

Data can be retrieved into a PL/SQL variable or a PL/SQL record Signup and view all the answers

What is the purpose of the FETCH statement in PL/SQL?

To retrieve data from a cursor into a PL/SQL variable Signup and view all the answers

What does opening a cursor in PL/SQL involve?

Allocating memory for the cursor Signup and view all the answers

What is the next step after opening a cursor in PL/SQL?

Fetching data Signup and view all the answers

What is the purpose of the closing statement for a cursor in PL/SQL?

Relinquishes all associated resources Signup and view all the answers

What action should be taken after finishing work with a cursor in PL/SQL?

Close the cursor Signup and view all the answers

What does the 'CLOSE' command do in PL/SQL when used with a cursor?

Relinquishes all associated resources Signup and view all the answers

What are the four steps for creating an explicit cursor in PL/SQL?

Declare the cursor, Open the cursor, Fetch data from the cursor, Close the cursor Signup and view all the answers

What is the purpose of the FETCH statement in PL/SQL?

To retrieve data from the active set of a cursor Signup and view all the answers

What does the OPEN statement do in the context of an explicit cursor in PL/SQL?

It makes the cursor's result set available for fetching Signup and view all the answers

What is the purpose of the FETCH statement in PL/SQL when used with a cursor?

To retrieve data from the active set one row at a time Signup and view all the answers

What does the 'CLOSE' command do in PL/SQL when used with a cursor?

It closes the cursor and releases associated resources Signup and view all the answers

What is the first step in creating an explicit cursor in PL/SQL?

Declare the cursor Signup and view all the answers

What is the purpose of the SET SERVEROUTPUT ON statement in the declaration section of a PL/SQL block?

To enable viewing the cursor's results on the default display screen Signup and view all the answers

What is the purpose of declaring a variable in the declaration section of a PL/SQL block?

To store the data retrieved by the cursor Signup and view all the answers

What does the LOOP structure in the code comprise of?

cursor opening, loop structure, fetch statement, DMS outpout statement, exit statement, closing cursor Signup and view all the answers

What happens when the DBMS OUTPUT statement is used in PL/SQL?

The fetched data is displayed on the default output screen Signup and view all the answers

When does the loop exit in PL/SQL using the %NOTFOUND attribute?

When no more data is found Signup and view all the answers

What is the purpose of closing the cursor in PL/SQL?

To release associated resources Signup and view all the answers

What is the data type of %FOUND attribute in PL/SQL?

Boolean Signup and view all the answers

What does %NOTFOUND indicate in PL/SQL when the most recent fetch operation did not return a row?

No rows were fetched Signup and view all the answers

What does %ROWCOUNT return in PL/SQL?

The number of rows that have been fetched Signup and view all the answers

What does the %FOUND attribute indicate in PL/SQL?

Returns TRUE if the most recent fetch operation returned a row Signup and view all the answers

What does the %NOTFOUND attribute indicate in PL/SQL?

Returns TRUE if the most recent fetch operation did not return a row Signup and view all the answers

What happens when a cursor is closed in PL/SQL?

The cursor is deallocated and associated resources are released Signup and view all the answers

What does the FETCH statement in PL/SQL do when used with a cursor?

Retrieves the next row from the result set Signup and view all the answers

What type of cursors are automatically created by the Oracle server when an SQL DML statement is executed?

Implicit cursors Signup and view all the answers

What is the syntax for a basic cursor loop in PL/SQL?

open cursor, LOOP fetch v_name into cursurname, exit, executable, end loop, close cursor Signup and view all the answers

What is the syntax for a cursor for loop in PL/SQL?

FOR record_name IN cursor_name LOOP Signup and view all the answers

What is the purpose of the FETCH statement in PL/SQL when used with a cursor?

To retrieve the next row from the result set into the record Signup and view all the answers

Oracle Database Cursors Basics Quiz

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Questions and Answers

What does a cursor serve as in the context of an Oracle database?

What kind of information does the context area, pointed to by a cursor, hold?

Where is the context area, to which a cursor points, located?

What type of information does the context area within the PGA hold?

What does the context area assist the Oracle server in processing?

What type of information does the context area within the PGA hold?

What does the context area assist the Oracle server in processing?

What does a pointer within the context area in the PGA refer to?

What type of cursors are automatically created by the Oracle server when an SQL DML statement is executed?

Where are implicit cursors created in the Oracle database?

For which type of statements must users create explicit cursors in Oracle database?

What is the first step in creating an explicit cursor in PL/SQL?

Where is the explicit cursor associated with a SELECT statement initialized?

What does declaring an explicit cursor involve in PL/SQL?

How is a cursor declared in PL/SQL?

What does declaring a cursor involve in PL/SQL?

How is data retrieved from a cursor in PL/SQL?

What happens once a cursor is declared and opened in PL/SQL?

What is the purpose of the FETCH statement in PL/SQL?

What does opening a cursor in PL/SQL involve?

What is the next step after opening a cursor in PL/SQL?

What is the purpose of the closing statement for a cursor in PL/SQL?

What action should be taken after finishing work with a cursor in PL/SQL?

What does the 'CLOSE' command do in PL/SQL when used with a cursor?

What are the four steps for creating an explicit cursor in PL/SQL?

What is the purpose of the FETCH statement in PL/SQL?

What does the OPEN statement do in the context of an explicit cursor in PL/SQL?

What is the purpose of the FETCH statement in PL/SQL when used with a cursor?

What does the 'CLOSE' command do in PL/SQL when used with a cursor?

What is the first step in creating an explicit cursor in PL/SQL?

What is the purpose of the SET SERVEROUTPUT ON statement in the declaration section of a PL/SQL block?

What is the purpose of declaring a variable in the declaration section of a PL/SQL block?

What does the LOOP structure in the code comprise of?

What happens when the DBMS OUTPUT statement is used in PL/SQL?

When does the loop exit in PL/SQL using the %NOTFOUND attribute?

What is the purpose of closing the cursor in PL/SQL?

What is the data type of %FOUND attribute in PL/SQL?

What does %NOTFOUND indicate in PL/SQL when the most recent fetch operation did not return a row?

What does %ROWCOUNT return in PL/SQL?

What does the %FOUND attribute indicate in PL/SQL?

What does the %NOTFOUND attribute indicate in PL/SQL?

What happens when a cursor is closed in PL/SQL?

What does the FETCH statement in PL/SQL do when used with a cursor?

What type of cursors are automatically created by the Oracle server when an SQL DML statement is executed?

What is the syntax for a basic cursor loop in PL/SQL?

What is the syntax for a cursor for loop in PL/SQL?

What is the purpose of the FETCH statement in PL/SQL when used with a cursor?

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