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1 NF Normal Form
The domain of attribute must add only atomic (simple, indivisible) values First normal form (Minimal Form or 1NF) is a normal form need in database normalization. A relational database table that complete to 1NF is one that collide a certain minimal set of criteria. These criteria are usually concerned with ensuring that the table is a faithful presentation of a relation and that it is free of repeating sets.
Types of Data fragmentation
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Backward Recovery (UNDO): In this system the uncommitted changes made by a transaction to a database are undone. Instead the system is reset to the last consistent state of databa
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
what is Lossless-join decomposition
Differentiate between a unique key and a primary key. - By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
What are the advantages of object ID? The main advantages of Object IDs are as below: i) IDs are not changing ii) IDs are completely independent of the changes in data v
Benefits and limitations
By which techniquesTransaction processing is associated? Transaction processing is associated by producing detail, summary, or exception reports and recording a business activi
What is persistency? Persistency ensures which data is stored and that after the object is no longer available (program stops running) the data will be available to other users
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