SQLJ and JDBC: Database Access in Java in Java

Integrate qr bidimensional barcode in Java SQLJ and JDBC: Database Access in Java
CHAPTER
scanning qr-code with java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
SQLJ and JDBC: Database Access in Java
QR Code JIS X 0510 implementation on java
using barcode integrating for java control to generate, create qr code image in java applications.
In this chapter we will look at SQLJ and JDBC, the two standard ways of using objectrelational databases in Java programs. Java is the language of choice for writing Internet applications, and SQL is the prime language for programming databases. SQLJ and JDBC are important technologies that provide the bridge between front-end Java applications and back-end SQL databases. The first question that comes to mind is: Why do we need two ways Why is one, just SQLJ or only JDBC, not enough The answer is that JDBC and SQLJ are meant to serve distinct but complementary purposes SQLJ supports embedded SQL whereas JDBC is an application program interface, and SQLJ typically uses JDBC under the covers to execute SQL operations. But before we dive into their differences, let us first look at when and why these database programming frameworks came into existence.
QR Code ISO/IEC18004 barcode library with java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
A Bit of Background
Barcode barcode library for java
using barcode generator for java control to generate, create barcode image in java applications.
Java is an object-oriented language. Object-oriented programming is based on the concept of objects and classes. A class is used to group logically related data into a modular unit and to provide methods that encapsulate the behavior associated with this data. An object is an instance of a class. Object-oriented languages such as Smalltalk and C++ have been widely used for a number of years. Java combines their good features but eliminates much of the complexity of C++. It also emphasizes robustness and portability across different platforms. Java is strongly typed; that is, each Java object has a specific type that defines its attributes and methods. Most type errors are caught while 53
Barcode decoder in java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
5
Control qr code jis x 0510 data on visual c#.net
to connect qr code 2d barcode and qr-codes data, size, image with .net c# barcode sdk
compiling Java programs, thus promoting robustness. Additionally, only safe memory operations are permitted in Java. Unlike a C or C++ program, a Java program cannot perform unsafe and arbitrary pointer operations on data residing in memory. Java also provides automatic garbage collection that reclaims memory of objects no longer used in a program, as in Smalltalk. As the use of Java took off among the programming community in the mid-1990s, designers at Sun Microsystems saw the need to support database access from Java programs. Working with the major database vendors, in 1996 they specified a proposal for JDBC. The JDBC specification [JDBC Spec] defines a set of interfaces for SQL-based database access from Java. JDBC is an application program interface (API), which means that SQL statements are executed on a database by calling methods in the JDBC library from Java code. The JDBC programming model is based on ODBC, which is an earlier standard for database programming. The JDBC API soon became the de-facto standard for database programming in Java. Shortly after, the major database companies initiated a joint effort to design and standardize embedded SQL support in Java. This language is known as SQLJ. The open-source SQLJ Reference Implementation was made publicly available by Oracle in early 1998, and around that time the SQLJ language was also submitted to ANSI for standardization. It was formally accepted as an ANSI standard in December 1998. Now let's get back to our original question What is the goal of SQLJ Why do we need SQLJ if we already have JDBC Here's why: In contrast to the library calls in JDBC, SQLJ allows SQL statements to be written directly inside Java code using the compact and convenient #sql notation, as in the code snippet shown in Listing 3.1. The intent of the code should be intuitively obvious, but let us look into the details to better understand how it actually works.
Web qr code generatingon .net
using barcode integrating for asp.net aspx control to generate, create qr code image in asp.net aspx applications.
SQLJ Basics
Quick Response Code barcode library on .net
using barcode creator for visual .net control to generate, create qr code image in visual .net applications.
SQLJ consists of several different aspects: The SQLJ language with special syntax for embedding SQL statements A translator that converts SQLJ code to Java The SQLJ runtime/execution model We will examine each of these topics briefly in the sections that follow.
QR drawer in vb.net
using .net framework tocompose qr for asp.net web,windows application
String name = "Joe Doe"; String phone = "(650)123-4567"; #sql { INSERT INTO PHONES (name, phnumber) VALUES (:name, :phone) };
Java barcode integratedwith java
generate, create bar code none for java projects
Java ean13+2 integrationwith java
use java ean13 generation todraw gs1 - 13 for java
Connect msi with java
use java modified plessey encoder todisplay msi plessey for java
EAN13 barcode library on microsoft word
generate, create upc - 13 none on word projects
Draw 3 of 9 barcode for .net
use rdlc code 3/9 generation toget 39 barcode on .net