The procedure is a part of the PL/SQL subprogram which performs a particular task. All procedures possess a unique name and are an independent block of code. A procedure may contain a nested block or can be described inside other packages or blocks. A procedure has parameters included while ...
Triggers are database procedures. These will be fired implicitly, when certain thing happens. Create Triger Example CREATE OR REPLACE TRIGGERmy_sal_changes BEFORE DELETE OR INSERT OR UPDATE ON Emp_tab FOR EACH ROW WHEN (new.Empno > 0) DECLARE sal_diff number; BEGIN sal_diff := :new.sal ...
PL/SQL provides bulk processing techniques to optimize SQL-to-PL/SQL interaction by fetching or modifying multiple rows at once. For example, the PL/SQL block below retrieves all employees from department 10 usingBULK COLLECTinto a collection and iterates through it to print each employee's nam...
we will discuss the topics like an overview of PL SQL comprising its definition, its features, some of the advantages of using PL/SQL, and differences between PL/SQL and SQL. We will also explore the basic syntax along with its identifiers, delimiters, and comments. ...
Watch this video about PL/SQL Interview Questions on YouTube: 11. What are the Various Types of Parameters in PL/SQL? There are three types of parameters in PL/SQL. They are as follows: IN:The IN parameter allows you to send values to the procedure that is being called. The IN parame...
Example of PLSQL procedure Let us learn the implementation of the PL/ SQL stored procedures with the help of some examples – Let us look at the example that demonstrates how the cursor can be used in PL/ SQL to retrieve the information about a particular entry in the table. Consider that...
Real Example: FOR Sample_cursor IN C1 LOOP Total_Salary=Total_Salary + Appraisals; END LOOP; 6.What is Database Trigger?What is real use of trigger? Answer : PL SQL procedure which is used to trigger specific event on specific condition is known as database triggers. Triggers are databa...
PL/SQL Questions and Answers - Explore a comprehensive collection of PL/SQL questions and answers to enhance your database programming skills. Perfect for interviews and exam preparation.
For example,CREATE OR REPLACE TYPE rectangle AS OBJECT (length number, width number, NOT INSTANTIABLE NOT FINAL MEMBER PROCEDURE display) NOT INSTANTIABLE NOT FINAL / When the above code is executed at the SQL prompt, it produces the following result −...
SQL命令未正确结束PL/SQL sql oracle plsql 据我所知,这个错误是由语句不允许的子句引起的,但是我看不出这个查询有什么问题。 accept cruiseRange prompt "Enter cruising range: "; CREATE OR REPLACE PROCEDURE runSqlAndGetManyTuples (cruiseRange NUMBER) IS planeName varchar2(20); planeID NUMBER; ...