CBSE Class 12 Informatics Practices Tables And Exception Propagation

Read and download CBSE Class 12 Informatics Practices Tables And Exception Propagation in NCERT book for Class 12 Informatics Practices. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Informatics Practices textbook for Class 12 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 12 Informatics Practices to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 12 Informatics Practices Tables And Exception Propagation

Class 12 Informatics Practices students should refer to the following NCERT Book Tables And Exception Propagation in Class 12. This NCERT Book for Class 12 Informatics Practices will be very useful for exams and help you to score good marks

Tables And Exception Propagation NCERT Book Class 12

 

Chapter – 3

Tables And Exception Propagation

(Informatics Practices)

PL/SQl TABLEs combine characteristics of SQL tables and C/Pascal arrays.

Like SQL tables:

  • consist of records (must have a numeric primary key)
  • can grow/shrink as elements are added/removed

Exceptions

An exception is an unusual/erroneous condition encountered during execution:

  • system error (e.g. "out of memory")
  • error caused by user program
  • warning issued by application

PL/SQL's exception handling allows these to be handled "cleanly" in a central place.

Syntax for exception handlers:

BEGIN

... Statements ...

EXCEPTION

WHEN ExcepName1 THEN Statements1;

WHEN ExcepName2 THEN Statements2;

...

END;

If an error occurs in Statements, control is transferred to:

  • the exception handler in this block
  • the exception handler at the next enclosing block
  • ... and so on out to the system level

Example: Computing stock-market price/earnings ratio

DECLARE

       pe_ratio NUMBER(5,1);

BEGIN

     SELECT price/earnings INTO pe_ratio

     FROM StocksWHERE company_name = 'Acme';

    INSERT INTO Statistics(co_name, ratio)

        VALUES ('Acme', pe_ratio);

   COMMIT;

EXCEPTION

   WHEN ZERO_DIVIDE THEN -- divide-by-zero errors

   INSERT INTO Statistics(co_name, ratio)

       VALUES ('Acme', 0.0);

-- other exception handlers

END;


Please refer to attached file for CBSE Classs 12 Informatics Practices Tables And Exception Propagation

Informatics Practices NCERT Book Class 12 Tables And Exception Propagation

The above NCERT Books for Class 12 Informatics Practices Tables And Exception Propagation have been published by NCERT for latest academic session. The textbook by NCERT for Tables And Exception Propagation Informatics Practices Class 12 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Tables And Exception Propagation NCERT etextbooks as the exams for Class 12 Informatics Practices are always asked as per the syllabus defined in these ebooks. These Class 12 Tables And Exception Propagation book for Informatics Practices also includes collection of question. We have also provided NCERT solutions for Class 12 Informatics Practices which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 12 students.

NCERT Book Class 12 Informatics Practices Tables And Exception Propagation

The latest NCERT book for Tables And Exception Propagation pdf have been published by NCERT based on the latest research done for each topic which has to be taught to students in all classes. The books for Class 12 Informatics Practices Tables And Exception Propagation are designed to enhance the overall understanding of students. All Class 12 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 12 students. 

Tables And Exception Propagation NCERT Book Class 12 Informatics Practices

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Class 12 Informatics Practices Tables And Exception Propagation NCERT Book

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Class 12 Tables And Exception Propagation NCERT Book Informatics Practices

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