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Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers.
In contemporary usage, memory is usually semiconductor storage read-write random-access memory, typically DRAM (Dynamic-RAM) or other forms of fast but temporary storage. Storage consists of storage devices and their media not directly accessible by the CPU, (secondary or tertiary storage), typically hard disk drives, optical disc drives, and other devices slower than RAM but are non-volatile (retaining contents when powered down). Historically, memory has been called core, main memory, real storage or internal memory while storage devices have been referred to as secondary storage, external memory or auxiliary/peripheral storage.
WordPress, as most other modern content management systems, is a very database-centric application. It keeps all information in the database – blog settings, posts, comments, links, users, etc. Therefor it is important to understand how the database is organized, what types of data is stored there, and how different things are linked to each other.
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