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Microsoft Access, Oracle, MySQL, etc. are some of commonly used RDBMS.

DBMS vs RDBMS

Table Table
Table

xml Table Table
xml
xml Table The Relational Model was proposed in
xml 1970 by E.F. Codd of IBM.
xml
DBMS RDBMS

COMPONENTS OF RELATIONAL DATABASE
The key components of a relational database are as follows:

Student Table

Fields

Student_ID First_Name Last_Name Date of Birth Email Course_ID

1 Aarav Sharma 15-Mar-2012 aarav.sharma@gmail.com C101
2 Priya Patel 20-May-2012 priya.patel@gmail.com C102
Table 3 Rahul Verma 10-Mar-2012 rahul.verma@gmail.com C103 Records

4 Sneha Iyer 25-Nov-2011 sneha.iyer@gmail.com C101
5 Dev Kapoor 12-Jul-2012 dev.kapoor@gmail.com C102

The different components of a relational database are as follows:

Tables: A table is a collection of related records arranged in rows and columns. Each column
represents a specific type of information (attribute) and each row represents a record (tuple)
containing related data.
Fields: A field represents one related part of a table. It contains the same kind of data in a

table. For example, Student_ID, First_Name, Last_Name, Date of Birth, Email and Course_ID
are fields in the table.

Records: A record is a collection of related data stored in different fields, treated as a single
unit. It represents the data which is entered in a set of different fields which are related to a
particular item. For example, 1, Aarav, Sharma, 15-Mar-2012, aarav.sharma@gmail.com and
C101 is one of the records of the table.

KEYS IN DATABASE
A key is a column or set of columns that identifies records in a table. It is also called a key field and
can link data between tables. The most common types of keys in SQL are the primary key and the

foreign key.

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