Here are 50+ frequently asked PL/SQL interview questions and answers which will definitely help you out to crack one of the toughest interviews. Q1. How can you Rollback a particular part of a procedure or any PL/SQL Program? It can be done using Savepoints during definition of a PL/SQL program. Q2. Is there …
PL/SQL triggers are block structures or pre-defined programs, which may be in-built or even explicitly developed by the programmers for a particular task. Triggers are automatically executed when an event occurs which is well thought of by the programmer in advance. Triggers are associated with response-based events such as a Database Definition Language (DDL) statement …
Whenever you try to execute an SQL statement, Oracle processes it in a separate memory zone called as ‘Context Area’. It contains information regarding information retrieved from database tables/records, SQL query, number of rows accessed by it and many more. This Context Area is controlled by a ‘Cursor’. A PL/SQL cursor can hold one or …
There are two types of PL/SQL blocks: 1. Named Blocks 2. Anonymous Blocks PL/SQL Functions Function is one of the two available Named Blocks in Pl/SQL, the other being Procedure. In PL/SQL, a function takes one or more parameter and returns one value. The main difference between a PL/SQL function and a PL/SQL procedure is …
A subprogram is a module or a small unit/part of a program that performs a particular task. In modular programming, a program can optionally consist of multiple subprograms. Note: A schema level subprogram is a standalone subprogram. PL/SQL Procedure A procedure is a group of PL/SQL statements that you can call by its name. These …
There may arise a situation when you need to execute a particular block of code several number of times. Programming languages provide various control structures that allow for more complicated execution paths and Loops are one of them. In other words, you may sometimes need to run a particular block of code in the program …
Decision-Making is an important part for most of the computer programs. It helps to develop the program code logically. For correct decision making, PL/SQL provides us with the Conditional Statements. These Conditional Statements helps us to develop a proper algorithm and a logical program. Decision-making programs or structures require that the developer mentions conditions to …
In the previous tutorial we have learnt much about PL/SQL variables, operators, data types and other such fundamental topics. Let us get into real programming now onwards. For starters, let us look at a PL/SQL program to add two numbers or integers and fetching the result into a third variable. This program takes two inputs …
