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Fifth Normal Form (5NF)
These relations still have a difficulty. While defining the 4NF we mentioned that all the attributes depend upon each other. Whereas creating the two tables in the 4NF, although we have preserved the dependencies among Vendor Code and Item code in the first table and Vendor Code and Item code in the second table, we have lost the relationship among Item Code and Project No. If there were a primary key then this loss of dependency would not have happened..
Create role named role_table that allows a user to create tables. Using role_table allow users kripa and reena to create tables. CREATE ROLE role_table; GRANT CREATE ANY TABLE
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
what is entity in database system?
Define the Query optimisation The query parser commonly generates a standard initial tree to correspond to an SQL query, with no doing any optimization. Such type of a canonica
Implementation and SQL Applications
Inconsistent Analysis : The problem as given with transactions T1 and T2 where two transactions interleave to make incorrect result during an analysis by Audit is the instance of s
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
4. Describe three ways to handle missing field values
compare the features of oracle RDBMS with MySQL and Microsoft SQL server
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