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Questions and Answers
What is the purpose of the DECLARE statement in the given code?
What is the purpose of the DECLARE statement in the given code?
- To initialize a variable
- To declare a cursor (correct)
- To handle exceptions
- To execute a SQL statement
What is the data type of the variable v_emp_name?
What is the data type of the variable v_emp_name?
- emp.ename%TYPE (correct)
- emp%TYPE
- emp.ename%ROWTYPE
- emp%ROWTYPE
What will be the output of the DBMS_OUTPUT.PUT_LINE statement in the given code?
What will be the output of the DBMS_OUTPUT.PUT_LINE statement in the given code?
- The maximum salary of employees in the EMP table
- The name of the first employee in the EMP table
- The name of the last employee in the EMP table (correct)
- The count of employees in the EMP table
What is the purpose of the EXCEPTION block in the given code?
What is the purpose of the EXCEPTION block in the given code?
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What will happen if the cursor emp_cursor is invalid?
What will happen if the cursor emp_cursor is invalid?
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Study Notes
Oracle PL/SQL Programming
- A declaration section is used to declare a cursor,
emp_cursor, which retrieves all records from theemptable. - The
v_emp_namevariable is declared to store the employee name, and its data type is set to match theenamecolumn in theemptable. - A
FORloop is used to iterate through the records in theemp_cursorcursor. - Within the loop, the
v_emp_namevariable is assigned the value of the current employee's name (emp_rec.ename). - After the loop, the
DBMS_OUTPUT.PUT_LINEfunction is used to display the name of the last employee processed. - An
EXCEPTIONblock is used to handle theINVALID_CURSORerror, which is raised if the cursor is not valid. - If the
INVALID_CURSORerror occurs, theDBMS_OUTPUT.PUT_LINEfunction is used to display an error message, 'CURSOR NO VALIDO'.
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Description
This quiz tests your understanding of PL/SQL cursors using a sample code. It involves declaring a cursor, iterating through the records, and displaying the last employee's name.
