what is the diff between dbms and rdbms(what are the 12
rilations in the rdbms).
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Answer Posted / vikas gupta
dbms: is database management system
rdbms: it is the relational database management system.
12 rules for RDBMS are:
-data should be tabular or in normalized format
-accessing of data must be easy
-supports for null values in fields other than primary key
-tool must be same for database structure and for data
itself
-database must support at least one programming language
(SQL)
-data can be represented as views
-insert,update and delete operations for multiple
tables/rows
-data should be physically independent
-data must be logically independent
-integrity independence of database
-user should not know distribution of database
-modifying database structure must be through a language
like SQL
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