PL/SQL CASE Statement, Decision Making Statement in PL/SQL

Like real life in programming sometimes we need to execute some code on a specific condition, PL/SQL CASE statement allows us to execute a sequence of instructions based on a selector (A variable, function, expression etc)
and if selector value is equal to value or expression in WHEN clause then corresponding THEN clause will execute and process the statements

PL/SQL Conditions, IF-ELSE Conditional Statement

Like other programming languages, PL/SQL supports decision making statements, These statements are also called conditional statement

Basic Syntax of IF-ELSE is like this in PL/SQL

IF (Condition 1)

THEN

Statement to execute (if condition 1 is true)

ELSIF (Condition 2)

THEN 

Statement to execute (if condition 2 is true)

ELSE

Statement to execute (if condition 1& 2 both are false)

END IF;

For a better understanding of concept look at these examples

PL/SQL Variables and Constants

A variable in any programming language is the name of space where values are stored and controlled by our code/program

• We can not use reserve keyword as a variable name 
• Variable length should not exceed 30 characters
• The variable name consists of letters followed by other letters, dollar sign, underscore and numerals
• The variable name should be clear and easy to understand

Here we'll learn how to declare and initialize variables in PL/SQL

The basic syntax for declaring a variable in PL/SQL is following

variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value] 

Here variable_name is the identifier of variable and datatype is a valid PL/SQL datatype. CONSTANT and DEFAULT are keywords used to define constants and set default values of variables

Show saved file (pdf/text/html/xml/image) content on page from database (BLOB) in ADF Application

Hello All

Previously I have posted about uploading and saving files in database blob column now this post is about showing saved file content on page using ADF Faces inline frame component

In this post I am extending same previous application, Now see how we can implement this
There are few more steps to go , See the additional steps to show file content on page-

Uploading and downloading files from database (BLOB) in Oracle ADF (12.1.3)

Hello all

This post is about a very simple requirement -file handling (uploading and downloading various types of file) in ADF and it is needed very often to store file in absolute server path (actual path) and download from there and I have posted about that previously

Uploading and downloading files from absolute server path

Now this post is about uploading and saving file in database BLOB column and downloading from there
See step by step implementation -