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Role of SQL in RDBMS
RDBMS stands for Relational DataBase Management System. Oracle, MySQL, MS SQL Server, IBM DB2 and Microsoft Access are RDBMS packages. SQL is a language used to access data in such databases.
In general, Database is a collection of tables that store sets of data that can be queried for use in other applications. A database management system supports the development, administration and use of database platforms. RDBMS is a type of DBMS with a row-based table structure that connects related data elements and includes functions related to Create, Read, Update and Delete operations, collectively known as CRUD.
The data in RDBMS, is stored in database objects, called Tables. A table is a collection of related data entries and it consist of rows and columns.
A field is a column in a table that is designed to maintain specific related information about every record in the table. It is a vertical entity that contains all information associated with a specific field in a table. The fields in a student table may be of the type AdmnNo, StudName, StudAge, StudClass, Place etc.
A Record is a row, which is a collection of related fields or columns that exist in a table. A record is a horizontal entity in a table which represents the details of a particular student in a student table.
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