Database is a very useful thing for maintaining your website. Work with static project consisting of several html pages easily without the use of databases. However sites tend to grow. This method hardly will justify itself with a dynamic project. It is troublesome and slow to store arrays of different information in hundreds of files, and then require certain strings when working on the web server. Database allows us to structure and organize information. Code for using databases is much easier than similar for working with files and it takes less time to request.
Database is a collection of related tables. For example, one table may store information about registered user on the site and the other stores information about comments that user left on the website.
The best solution is to store information like lists, comments, and etc in the database. However the database is not always static, often the opposite, it is regularly updated and corrected. There are database management system for easily management of these databases, modifying and adding data.
In modern Internet technology one of the most popular DBMS is, no doubt, MySQL.
The main advantages of MySQL include high speed, fast processing and optimum reliability. It is also important that DBMS is free and represents a software with open source. You can make changes and modify the code. It is very useful for webmasters.
MySQL is one of the numerous software for working with SQL databases.
SQL is a structured query language created for relational database management. It has a wide range of opportunities, for example, create a table, edit and delete data, make requests from tables and much more.
How is data stored in relational databases?
Imagine a very simple table with names, phone numbers, addresses, etc. In this way data in relational databases is stored, table is organized by columns and rows. The name assigned to each column, it is displayed in the title, all values in this column are only variables of the same type. The columns are located in a certain strict order, while the rows are unordered. It often happens that some cells in the same table associated with the value of cells of another table and so on. The database requests return the result in a table.
The data in the database are divided into unique or non-unique. Non-unique is the name, year of birth, time, etc., as a unique is credit card number or contract number of hosting services. Unique values are present in the lists of so-called “unique index”.
A big advantage of MySQL is the ability to work with the API (Application Program Interface). API can provide easy access from user program to DBMS. Even if these programs are written in Perl, C, etc.