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construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er d
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Given the following relations TRAIN (NAME, START, DEST) TICKET (PNRNO., START, DEST, FARE) PASSENGER (NAME, ADDRESS, PNRNO.) Write SQL expressions for the following queries: No
explain concept of decomposition?
Consider a database application that deals with an Employee relation with information such as SIN, name, data of birth (DOB), and DID (the ID of the department at which the employe
BCNF Boyce-Codd Normal Form A relation schema R is in BCNF if it is in 3NF and accepts an additional constraint that for every FD X A, X has to be a candidate key. If a relati
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
Explain the integrity constraints: Not Null, Unique, Primary Key with an example each. Is the combination 'Not Null, Primary Key' a valid combination. Justify. Not Null - Shou
WHAT IS DSS? WRITE ITS REQUIREMENTS.
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
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