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to develop elrctronic database from manual forms
HOW MANY TYPES OF VIEWS
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
project on dbms
What is aggregate function? Briefly describe it? Aggregate functions are functions that take a collection of values as input and return a one value. SQL offers 5 built-in aggre
crete a data base relationship model Entity: Students; Professors; Dormitories buildings; Attributes of students: Name; Address; Dorm;
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
Replicating Data One approach that may support efficient access to dissimilar applications as above may be to give access to every of the applications from dissimilar replicate
Explain the disadvantages of creating a temporary table? If you have already created a temporary table with a shown name and attempting to create a second one with that nam
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