MySQL: An Open-Source Relational Database Engine for Fast, Reliable, and Scalable Data Management in Web Applications

MySQL: An Open-Source Relational Database Engine for Fast, Reliable, and Scalable Data Management in Web Applications

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  MySQL Intoduction Dr.GINNE MJAMES Assistant Professor Department of Computer Science with Data Analytics Sri Ramakrishna College of Arts and Science Coimbatore - 641 006 Tamil Nadu, India 1
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  • What isMySQL? • Definition: • MySQL is an open-source relational database management system (RDBMS). • Key Points: • Developed by MySQL AB, now owned by Oracle Corporation. • Uses SQL (Structured Query Language) for database access. • Known for its speed, reliability, and ease of use.
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  • Features ofMySQL • Performance and Scalability: • Handles large databases. • High-speed data retrieval. • Reliability and Uptime: • Stable and secure. • Flexibility: • Supports multiple storage engines. • Open Source: • Free to use and modify. • Cross-Platform: • Runs on various operating systems including Windows, Linux, and macOS.
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  • MySQLArchitecture • Client-ServerModel: • Clients connect to the MySQL server to request data. • Storage Engines: • MyISAM, InnoDB, etc. • Components: • SQL Parser, Query Optimizer, Storage Manager.
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  • Data Typesin MySQL • Numeric Types: • INT, FLOAT, DOUBLE, DECIMAL • String Types: • CHAR, VARCHAR, TEXT, BLOB • Date and Time Types: • DATE, TIME, DATETIME, TIMESTAMP • Other Types: • ENUM, SET
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  • Keys inMySQL • Primary Key: • Uniquely identifies each record in a table. • Foreign Key: • Ensures referential integrity between tables. • Unique Key: • Ensures all values in a column are unique. • Index: • Improves the speed of data retrieval.
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  • Basic Queriesand Operations • SELECT: • Retrieve data from the database. • INSERT: • Add new records to the database.
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  • UPDATE:Modify existingrecords. UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition; • DELETE:Remove records from the database. • DELETE FROM table_name • WHERE condition;