Read and download CBSE Class 12 Informatics Practices Iteration And Cursors 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 Iteration And Cursors
Class 12 Informatics Practices students should refer to the following NCERT Book Iteration And Cursors in Class 12. This NCERT Book for Class 12 Informatics Practices will be very useful for exams and help you to score good marks
Iteration And Cursors NCERT Book Class 12
Chapter – 2
Iteration And Cursors
EXITWHEN Cond;
is shorthand for
IF Cond THEN EXIT; END IF;
Loops can be named to allow multi-level exits
<<outer>>LOOP
___
<<inner>>LOOP
____ EXIT outer WHEN i > 100; ___
END LOOP;
___
END LOOP;
Cursors:
A cursor is a variable that can be used to access the result of a particular SQL query. Cursors can move sequentially from row to row (cf. file pointers in C).
Every SQL query statement in PL/SQL has an implicit cursor. It is also possible to declare and manipulate cursors explicitly:
DECLARE
CURSOR e IS
SELECT * FROM Employees
WHERE salary > 30000.00;
BEGIN
Cursors provide flexibility in processing rows of a query.
Simplest way to deal with a cursor is to loop over all rows using a FOR loop:
DECLARE
CURSOR e IS
SELECT * FROM Employees
WHERE salary > 30000.00;
total INTEGER := 0;
BEGIN
FOR emp IN e LOOP
total := total + emp.salary;
END LOOP;
dbms_output.put_line( 'Total Salaries: ' || total);
END;
Cursor loop variables are implicitly declared as the ROWTYPE for the SELECT result.
E.g. emp is implictly declared as Employees%ROWTYPE.
The cursor FOR loop is convenient shorthand for iteration implemented using the basic cursor operations:
-- assume declarations as before
OPEN e;
LOOP
FETCH e INTO emp;
EXITWHEN e%NOTFOUND;
total := total + emp.salary;
END LOOP;
CLOSE e;
___
Please refer to attached file for CBSE Classs 12 Informatics Practices Iteration And Cursors
Informatics Practices NCERT Book Class 12 Iteration And Cursors
The above NCERT Books for Class 12 Informatics Practices Iteration And Cursors have been published by NCERT for latest academic session. The textbook by NCERT for Iteration And Cursors 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 Iteration And Cursors NCERT etextbooks as the exams for Class 12 Informatics Practices are always asked as per the syllabus defined in these ebooks. These Class 12 Iteration And Cursors 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 Iteration And Cursors
The latest NCERT book for Iteration And Cursors 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 Iteration And Cursors 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.
Iteration And Cursors NCERT Book Class 12 Informatics Practices
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Class 12 Informatics Practices Iteration And Cursors NCERT Book
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Class 12 Iteration And Cursors NCERT Book Informatics Practices
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