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Java assignment-4
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Shivam Barnwal
MYSQL - Structured Query Language
MySQL - Introduction What is a Database?A database is a separate application that stores a collection of data. Each database has one or more distinct APIs for creating, accessing, managing, searching and replicating the data it holds.Other kinds of data stores can also be used, such as files on the file system or large hash tables in memory but data fetching and writing would not be so fast and easy with those type of systems.Nowadays, we use relational database management systems (RDBMS) to store and manage huge volume of data. This is called relational database because all the data is stored into different tables and relations are established using primary keys or other keys known as Foreign Keys.A Relational DataBase Management System (RDBMS) is a software that −· Enables you to implement a database with tables, columns and indexes.· Guarantees the Referential Integrity between rows of various tables.· Updates the indexes automatically.· Interprets an SQL query and combines information from various tables.RDBMS TerminologyBefore we proceed to explain the MySQL database system, let us revise a few definitions related to the database.·Database − A database is a collection of tables, with related data.·Table − A table is a matrix with data. A table in a database looks like a simple spreadsheet.·Column − One column (data element) contains data of one and the same kind, for example the column postcode.· Row − A row (= tuple, entry or record) is a group of related data, for example the data of one subscription.· Redundancy − Storing data twice, redundantly to make the system faster.· Primary Key − A primary key is unique. A key value can not occur twice in one table. With a key, you can only find one row.· Foreign Key − A foreign key is the linking pin between two tables.· Compound Key − A compound key (composite key) is a key that consists of multiple columns, because one column is not sufficiently unique.· Index − An index in a database resembles an index at the back of a book.· Referential Integrity − Referential Integrity makes sure that a foreign key value always points to an existing row.MySQL DatabaseMySQL is a fast, easy-to-use RDBMS being used for many small and big businesses. MySQL is developed, marketed and supported by MySQL AB, which is a Swedish company. MySQL is becoming so popular because of many good reasons −· MySQL is released under an open-source license. So you have nothing to pay to use it.· MySQL is a very powerful program in its own right. It handles a large subset of the functionality of the most expensive and powerful database packages.· MySQL uses a standard form of the well-known SQL data language.· MySQL works on many operating systems and with many languages including PHP, PERL, C, C++, JAVA, etc.· MySQL works very quickly and works well even with large data sets.· MySQL is very friendly to PHP, the most appreciated language for web development.· MySQL supports large databases, up to 50 million rows or more in a table. The default file size limit for a table is 4GB, but you can increase this (if your operating system can handle it) to a theoretical limit of 8 million terabytes (TB).· MySQL is customizable. The open-source GPL license allows programmers to modify the MySQL software to fit their own specific environments.
kaushal shah
Advance Java Imp questions
this is the imp que of java...
Sahil Vyas
Books of Java
JAVA IN A NUTSHELL: A DESKTOP QUICK REFERENCE
tulika goyal
Print Name and Age java Program
Java program to print name and age
Aditya Sethi
INHERITANCE AND ABSTRACT CLASS IN JAVA
This PDF gives you basic knowledge of inheritance and abstract class in java, it will be very help full in semester and competitive exam.
MINTU KUMAR SINGH
HTML File Paths
HTML File Paths A file path describes the location of a file in a web site's folder structure. File paths are used when linking to external files like: • Web pages • Images • Style sheets • JavaScripts ________________________________________ Absolute File Paths An absolute file path is the full URL to an internet file: Example Try it Yourself » The tag is explained in the chapter about HTML Images. ________________________________________ Relative File Paths A relative file path points to a file relative to the current page. In this example, the file path points to a file in the images folder located at the root of the current web: Example Try it Yourself » In this example, the file path points to a file in the images folder located in the current folder: Example
yash sharma
Java assignment for BSC-it for 1 St year student
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Swings in Java
It explains about Graphical User interface concepts And difference between AWT and SWINGS.
Uday Kumar Madarapu
JDBC Programming: Advanced Java
JDBC programming is explained by darshan institute.
Manthan Vasani
Java-4
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User Defined Exceptions in Java
This Power Point Presentation is about User Defined Exceptions in Java.
Java assignment-2
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What is Java Networking ?
java networking is presented by darshan institute.
Slides on Core JAVA
Slides on Core JAVA
MD ALI HASNAIN
java assignment
Java is a general-purpose programming language that is class-based, object-oriented, and designed to have as few implementation dependencies as possible.
parth gera