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Explain about primary key Primary Key: It is one of the candidate keys that are taken to be the recognizing key for the entire table. E.g. although there are two candidate ke
Explain trigger? Trigger: A database trigger is procedural code which is automatically executed within response to certain events on a particular table in a database. Trigger
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
(A) For the relation; CarSales (RegNo, BuyerName, Address, SalesPerson, Make, Model, Commission) The following functional dependences hold, RegNo _ID à Make, Model Reg
external view of DBMS in healthcare department?
what is database management system? & why it is required?
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
Do you have experts of the dbms
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