Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Subprograms
The PL/SQL has two types of subprograms known as the procedures and functions that can take parameters and be invoked. As the following example represents, a subprogram is like a miniature program, start with a header followed by an optional declarative part, an executable part, and an optional exception-handling part:
PROCEDURE award_bonus (emp_id NUMBER) IS
bonus REAL;
comm_missing EXCEPTION;
BEGIN
SELECT comm * 0.15 INTO bonus FROM emp WHERE empno = emp_id;
IF bonus IS NULL THEN
RAISE comm_missing;
ELSE
UPDATE payroll SET pay = pay + bonus WHERE empno = emp_id;
END IF;
EXCEPTION
WHEN comm_missing THEN
...
END award_bonus;
If called, this procedure accepts an employee number. And it uses the number to select the employee's payment from a database table and, at the similar time, calculate a 15% bonus. Now, it checks the bonus amount. If the bonus is zero or null, an exception is raised; or else, the employee's payroll record is updated.
Running the PL/SQL Wrapper To run the PL/SQL Wrapper, go through the wrap command at your operating system prompt by using the syntax as shown: wrap iname=input_file [oname=
Authorisations - Privileges As relational theory is silent on the issue of authorisation, it offers nothing with which SQL's vast edifice in support of what it calls privilege
Due to an increase in overhead costs, the buying price of all items needs to be increased. Management wants to see a report before deciding how much each product will go up. Add to
Relational Operators The relational operators permit you to compare randomly complex expressions. The list below provides the meaning of each operator:
I have a Pascal Source file that needs to be compiled into a Service. In addition, there are various functions (Pascal Procedures I guess) that need to be created to Read and Write
Functions The function is a subprogram that calculates a value. The Functions and procedures are structured similar, except that the functions have a RETURN clause. You can
Initializing and Referencing Collections Until you initialize a collection, a nested table or varray is automatically null (i.e. the collection itself is null, not its elements)
Enrolment was split - SQL Example shows how relvars IS_CALLED and IS_ENROLLED_ON can be derived from the original ENROLMENT relvar, using projection in the initial assignment
ALTER TABLE bb_basketitem ADD CONSTRAINT bitems_qty_ck CHECK (quantity BEGIN INSERT INTO bb_basketitem VALUES (88,8,10.8,21,16,2,3); END; Brewbean’s wants to add a check
Adding Table Constraints ALTER TABLE ENROLMENT ADD CONSTRAINT NameNotNull CHECK (Name IS NOT NULL) ; ALTER TABLE ENROLMENT ADD CONSTRAINT PK_StudentId_CourseId PRIM
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd