{"id":1525,"date":"2024-01-03T09:37:58","date_gmt":"2024-01-03T01:37:58","guid":{"rendered":"https:\/\/www.ruianding.com\/blog\/?p=1525"},"modified":"2024-01-04T13:40:11","modified_gmt":"2024-01-04T05:40:11","slug":"general-terminologies","status":"publish","type":"post","link":"https:\/\/www.ruianding.com\/blog\/general-terminologies\/","title":{"rendered":"MySQL-001 General Terminologies"},"content":{"rendered":"\n

Database (DB)<\/h3>\n\n\n\n

A database is a structured collection of data<\/strong>. It can be electronic (stored in a computer system) or physical (like a filing system in an office). In the context of IT and computing, a database typically refers to a data structure that stores information electronically.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\n\n\n\n

Database Management Systems (DBMS)<\/h3>\n\n\n\n

A special software system designed to help users create and manage databases.<\/p>\n\n\n\n

It provides an interface between the data stored in databases and the users or application programs.<\/p>\n\n\n\n

App service is telling the DBMS to do the job, instead of interactive with the DB itself directly.<\/p>\n\n\n\n

\n\n\n\n

C.R.U.D<\/h3>\n\n\n\n

It represents the four basic operations that can be performed on data in a database or a data storage system: Create, Read (Retrieve), Update, Delete<\/p>\n\n\n\n

    \n
  • Create<\/strong>: This operation involves adding new data to the database. For example, in a relational database, this could mean inserting a new row into a table.<\/li>\n\n\n\n
  • Read<\/strong>: This operation entails retrieving or reading data from the database. It could be as simple as fetching a single record or as complex as executing a query that filters and sorts a large amount of data.<\/li>\n\n\n\n
  • Update<\/strong>: This operation is about modifying existing data in the database. This could involve changing the values of certain fields in a record or several records.<\/li>\n\n\n\n
  • Delete<\/strong>: This operation involves removing data from the database. This could mean deleting a single record, a group of records, or even clearing an entire table.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    Two Main Types of Databases<\/h3>\n\n\n\n

    Relational Databases<\/strong> – SQL<\/h4>\n\n\n\n

    Relational databases store data in tables, which consist of rows and columns. Each row represents a unique record, and each column represents a field within the record.<\/p>\n\n\n\n

      \n
    • Relational Database Management Systems (RDBMS)<\/strong>\n
        \n
      • Help users create and maintain a relational database<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Use the Structured Query Language (SQL)<\/strong>\n
          \n
        • Standardized language for interacting with RDBMS<\/li>\n\n\n\n
        • Used to perform C.R.U.D operations, as well as other administrative tasks<\/li>\n\n\n\n
        • Used to defined tables and structures<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

          Popular examples include MySQL, PostgreSQL, Oracle, and Microsoft SQL Server.<\/p>\n\n\n\n

          Non-Relational Databases – NoSQL<\/h4>\n\n\n\n

          NoSQL databases can store data in various formats other than tabular relations. This includes document, key-value, wide-column, and graph formats.<\/p>\n\n\n\n

          \"\"<\/figure>\n\n\n\n

          Popular examples include MongoDB (document-based), Redis (key-value store), Cassandra (wide-column store), and Neo4j (graph database).<\/p>\n\n\n\n

          \n\n\n\n

          Database Queries<\/strong><\/h3>\n\n\n\n

          Database queries are requests to access data from a database<\/strong>. These queries are used to perform various operations on the data stored in the database, such as retrieving specific information, updating records, inserting new data, or deleting existing data. <\/p>\n\n\n\n

          Queries are a fundamental aspect of interacting with databases, allowing users and applications to manipulate and analyze the data according to their needs. <\/p>\n\n\n\n

          <\/p>\n","protected":false},"excerpt":{"rendered":"

          Database (DB) A database is a structured collection of data. It can be electronic (stored in a computer system) or physical (like a filing system in an office). In the context of IT and computing, a database typically refers to a data structure that stores information electronically. Database Management Systems (DBMS) A special software system […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[51],"tags":[],"class_list":["post-1525","post","type-post","status-publish","format-standard","hentry","category-mysql"],"yoast_head":"\nMySQL-001 General Terminologies - \u6781\u7b80IT\uff5cSimpleIT<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL-001 General Terminologies - \u6781\u7b80IT\uff5cSimpleIT\" \/>\n<meta property=\"og:description\" content=\"Database (DB) A database is a structured collection of data. It can be electronic (stored in a computer system) or physical (like a filing system in an office). In the context of IT and computing, a database typically refers to a data structure that stores information electronically. Database Management Systems (DBMS) A special software system […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\" \/>\n<meta property=\"og:site_name\" content=\"\u6781\u7b80IT\uff5cSimpleIT\" \/>\n<meta property=\"article:published_time\" content=\"2024-01-03T01:37:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-04T05:40:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ruianding.com\/blog\/wp-content\/uploads\/2024\/01\/image-2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"813\" \/>\n\t<meta property=\"og:image:height\" content=\"585\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Ruian Ding\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ruian Ding\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\"},\"author\":{\"name\":\"Ruian Ding\",\"@id\":\"https:\/\/www.ruianding.com\/blog\/#\/schema\/person\/440d88575b7dc819a4cefc8c4199db3b\"},\"headline\":\"MySQL-001 General Terminologies\",\"datePublished\":\"2024-01-03T01:37:58+00:00\",\"dateModified\":\"2024-01-04T05:40:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\"},\"wordCount\":439,\"publisher\":{\"@id\":\"https:\/\/www.ruianding.com\/blog\/#\/schema\/person\/440d88575b7dc819a4cefc8c4199db3b\"},\"image\":{\"@id\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.ruianding.com\/blog\/wp-content\/uploads\/2024\/01\/image-2.png\",\"articleSection\":[\"MySQL\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\",\"url\":\"https:\/\/www.ruianding.com\/blog\/general-terminologies\/\",\"name\":\"MySQL-001 General Terminologies - 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