Question Bank PL/SQL Fundamentals-I

Transcription

1 Question Bank PL/SQL Fundamentals-I UNIT-I Fundamentals of PL SQL Introduction to SQL Developer, Introduction to PL/SQL, PL/SQL Overview, Benefits of PL/SQL, Subprograms, Overview of the Types of PL/SQL blocks, create a Simple Anonymous Block, Generate Output from a PL/SQL Block SQL Identifiers List the different Types of Identifiers in a PL/SQL subprogram, Usage of the Declarative Section to define Identifiers, Use variables to store data, Identify Scalar Data Types, The %TYPE Attribute, Bind Variables, Sequences in PL/SQL Expressions Write Executable Statements Describe Basic PL/SQL Block Syntax Guidelines, Comment Code, Deployment of SQL Functions in PL/SQL, Nested Blocks, Identify the Operators in PL/SQL 1. Explain the syntax of defining variables and constants in PL/SQL and the data types used in PL/SQL block. 2. Explain the different built-in data types used in PL/SQL with brief examples 3. State the data types in PL/SQL with examples, how variables can be declared in PL/SQL. 4. Write a PL/SQL block to find the square of a number using substitution variable 5. What is sequence? How to use sequences explain with example. 6. Explain the %type attribute in PL/SQL with help of example. 7. Write a note on logical operators and rithmetic operators in PL/SQL. 8. What are the Benefits of using PL/SQL. 9. What is an Anonymous Block. Explain with help of Example. 10. Assuming a table products(p_no, p_name, p_stock, p_price). State and explain the queries to generate the p_no using sequence. Also explain how to display the next generated and current value of the sequence. 11. Explain the concept of nested block. 12. Explain String operator with help of Examples. 13. Describe Basic PL/SQL Block Syntax Guidelines. 14. Write a short note on sequence. Explain how to modify sequence. 15. Write a note on Bind Variable.

2 UNIT-II Conversion Functions implicit and explicit data type conversion, Describe the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions, Nesting multiple functions Control Structures Conditional processing Using IF Statements, Conditional processing Using CASE Statements, use simple Loop Statement, Use While Loop Statement, Use For Loop Statement, Describe the Continue Statement Composite Data Types Use PL/SQL Records, The %ROWTYPE Attribute, Insert and Update with PL/SQL Records, Associative Arrays (INDEX BY Tables), Examine INDEX BY Table Methods, Use INDEX BY Table of Records 1. Discuss GOTO Statement along with an example by stating the disadvantage of it. 2. Explain in detail about the control structures of PL/SQL. 3. Write a PL/Sql block to display the jobs by using case statement as below (similar programs are generally asked) Job = Manager if salary> Job - AsstManager 5 if salary < and > Job = Exec Engineer" if salary < Else print No Job 4. With syntax explain any loop construct in PL/SQL. Give Example. 5. Write a PL/Sql block to accept marks from the user when student (rollno, name, marks, class, sports_grade) is used to update class and sports_grade as below - If marks > 60 then class is 'I and sports_grade should be updated as A. If marks < 60 then class is IF and sports_grade should be updated as Null. At the time of execution, the table will have records for rollno and name. (similar programs are generally asked). 6. With the help of an example, example the Loop-End Loop statement of PL/SQL. 7. What is the role of NULL values in PL/SQL? 8. Write a note on logical operators in PL/SQL. 9. Write a PL/SQL block to find the square of a number which is accepted from the table square (num, sq) and store it under sq in the given table. 10. Write short notes on the following: a. Exit Statement b. GOTO statement c. Continue Statement d. TO_CHAR e. TO_NUMBER f. TO_DATE 11. Explain with help of example the %ROWTYPE ATTRIBUTE in PL/SQL. 12. Explain Records in PL/SQL with respect to Associative Arrays with help of example. 13. Explain insert and update with PL/SQL Records.

3 14. Write a PL/SQL block to find the following and insert it in a table: a. Factorial of a number b. Fibinnaci series c. Square of a number d. Area of circle 15. Write a PL/SQL code block that will accept an account number from the user, check if the users balance is less than the minimum balance, only then deduct Rs.100/- from the balance. The process is fired on the ACCT_MSTR table. 16. Explain the For loop with REVERSE keyword. 17. Explain the sequencial Statements in PL/SQL.

4 UNIT-3 Exception Handling Understand Exceptions, Handle Exceptions with PL/SQL, Trap Predefined Oracle Server Errors, Trap Non-Predefined Oracle Server Errors, Trap User-Defined Exceptions, Propagate Exceptions, RAISE_APPLICATION_ERROR Procedure Stored Procedures and Functions Understand Stored Procedures and Functions, differentiate between anonymous blocks and subprograms, Create a Simple Procedures, Create a Simple Procedure with IN parameter, Create a Simple Function, Execute a Simple Procedure, Execute a Simple Function. Invoke SELECT Statements in PL/SQL to Retrieve data Data Manipulation in the Server Using PL/SQL, SQL Cursor concept, Usage of SQL Cursor Attributes to Obtain Feedback on DML, Save and Discard Transactions. 1. Write a note on Exception handling in PL/SQL. 2. What is cursor? Explain cursor attributes. 3. How will you manipulate data in server using PL/SQL. 4. Explain the difference between anonymous block and subprograms(functions and procedures). 5. What is the difference between functions and procedures in PL/SQL. Explain with examples. 6. Explain the usage of Cursor Attribute to obtain feedback on DML. 7. Explain the IN, OUT and IN OUT parameters with respect to procedure. 8. Explain user-defined exception handling in PL/SQL. 9. How to Trap Non-Predefined Oracle Server Errors. Explain. 10. Explain how to Trap Predefined Oracle Server Errors. 11. What is commit, savepoint and rollback? Explain their usage with example.

5 UNIT-4 Explicit Cursors What are Explicit Cursors?, Declare the Cursor, Open the Cursor, Fetch data from the Cursor, Close the Cursor, Cursor FOR loop, Explicit Cursor Attributes, FOR UPDATE Clause and WHERE CURRENT Clause Collections Index-by tables or Associative array, Nested table, Variable-size array or Varray Strings, Date and Time functions, arrays 1. Discuss the parameterized cursors y giving suitable example.t 2. What is cursor? State and explain the types of cursors. 3. Explain the difference between cursor for loops and parameterized cursors. 4. State and explain the attributes of a cursor. 5. Explain the cursor For Loop. 6. Explain in detail FOR UPDATE and WHERE CURRENT clause with respect to cursors in PL/SQL. 7. What are explicit cursors. Explain its four statements. 8. Explain the implicit and Explicit Cursor and its attributes in PL/SQL. 9. Explain various collection in PL/SQL. 10. Write short nots on: a. Varray. b. Date and time Function. c. Cursor For Loop. 11. Explain Index by tables.