SQL, which stands for Standard Query Language, is a language that facilitates
interaction with databases as a way of managing all the data the databases hold.
SQL was developed in 1974 by IBM and was initially referred to as SEQUEL – Standard English QUEry Language. The name was eventually changed, but the SEQUEL pronunciation is still used by many today.
Almost all businesses, large and small, use data to manage their companies. To manage all this data, businesses must use databases. SQL is used to communicate with those databases. Specifically, SQL is used to modify and access data that is stored in relational databases. It is an English-like language that, essentially, tells a server what to do. SQL is used to get information from an existing database, to add, delete, or change the data, to define data types, and to provide security methods to protect data. Music applications, social media platforms, and finance companies are some examples of industries that use SQL.
Music apps use databases to store a lot of different information such as songs, albums, artists, as well as all the data about the user. Social media platforms store a ton of information, including the user’s personal information, when someone posts, and when someone sends a message. In the world of finance, systems such as payment processors and banking apps use complicated databases to manage data having to do with transactions and users. All of these databases need to be managed by SQL. It is very important to know and understand SQL as a programmer or developer since it can be used in many different applications.
Server architecture is the foundational layout or model of a given server. In essence, it defines how the server is designed, from what languages the server is comprised, and the services the server can provide. Some of the different categories that come into play when discussing server architecture is the computing power and storage, the installed components present on the server, the types and layers of applications running within the operating system, any authentication networks that might be present, and how the server communicates with other applications and services.
Microsoft SQL Server is one of, if not the most, popular options on the market used for database technology. The management system supports a wide variety of applications, including business intelligence, transaction processing, and analytics. The platform is built on SQL, which allows for accessible database and query data management. SQL Server tends to follow a set structure based on rows that allow the connecting of data and functions while ensuring maximum security and consistency. The system is constantly checking a relational model of the server work to ensure database transactions are processed with accuracy. Once the server is installed, automatic updates become a breeze, and data management is simple, straight-forward, and easy to use. SQL Databases are most commonly comprised of one or multiple data files (.mdf/.ndf) and one log file that records transactions (.ldf). The data files contained therein hold schema and data, whereas the Logfile records changes or additions. The organization of data can be thought of as pages in a book, and each file is a size of 8kb. The SQL server reads writes and modifies this data. Data retrieval with SQL Server is simple – the server accesses information by taking the whole 8kb file from disk and moving it into memory. All this data remains in memory until there is no longer any use for it. SQL modifies data through actions such as deleting or replacing the information. All adjustments are stored in a transaction log, which keeps the data safe in the event of a power outage. The data is sent back to disk after a period of no use. The transaction log then records that the data has been written back to disk.
MySQL is a commonly used open-source relational database management system that was created in the 1990s. The latest version of MySQL is comprised of a lot of features, which makes it extremely flexible and easy to use. MySQL supports many platforms, as opposed to SQL Server that only works with Linux and Windows. MySQL is often used in web-based applications. It is also commonly used for data warehousing, e-commerce, and logging systems. It can be used to interact with smaller databases containing only a little information, or larger databases that manage all the data for an online store, for example. MySQL creates a database for gathering and controlling data, identifying the relationship of each table. Clients, which are the computers that use relational database management system software, can communicate with the server using MySQL. The server will then communicate back with the requested data.