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explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
i would like to ask if you will do assignment of database number of words 1500 and how much
What is a trigger
Example : Search the name, department number and salary of employees drawing minimum salary in that department. SELECT ENAME, SAL, DEPTNO FROM EMP WHERE SAL IN (SELECT MI
Show a centralised schema to support the operation of the system you have chosen, including in particular: the product catalogue; the outlets and respective stocks; customer record
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
Creating a view: A query can be embedded within the CREATE VIEW STATEMENT A query can have complex select statements containing join, groups and sub- queries A quer
Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
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