SQL can perform various database operations like · Create and remove of database · Create, alter and remove the tables · Insert, update, delete and retrieve the records · Controlling the user access · Managing transactions during insertion, updation and deletion of records
Every column or field related to some entity has to manage a kind of data known as data type. In general, data can be of three types · Numeric type Data · String type Data · Date type Data Different RDBMS software provides different keywords to define the data type e.g. MySQL provides data types such as · INT for integer data numeric data e.g. Book Number · FLOAT for floating type numeric data e.g. Price · VARCHAR for variable length strings e.g. Name, Email · CHAR for fixed length strings e.g. Pin Code, Mobile Number · DATE for managing dates e.g. Date of Birth Remember that, ...
Structured Query Language (SQL) is the standard language for storing, manipulating and retrieving data in databases using special software known as Relational Database Management Systems (RDBMS). There are many RDBMS softwares available to store and manage the structured data. Some of the RDBMS softwares are MySQL, MariaDB, Oracle Database, Microsoft SQL Server, PostgreSQL, SQLite etc. SQL is case insensitive language. SQL became a standard of the American National Standards Institute (ANSI) in 1986 and of the International Organization for Standardization (ISO) in 1987
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