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What is meant by functional dependencies?
Consider a relation schema R and α C R and β C R. The functional dependency α ->β holds on relational schema R if in any legal relation r(R), for all pairs of tuples t1 and t2 in r like t1 [α] =t2 [α], and also t1 [β] =t2 [β].
After the completion of the logical model the physical model is to be made. The oracle 10 G will be used as a database server and all the tables with their column are created and i
What is a Name? A user-supplied name is used for identity. This form of identity is used for files in file systems. The user gives every file a name that uniquely identifies it
Project Description: The work is about founding the best skilled person for the job. I will give you the job description. Skills required are Data Entry, Database Administrat
Define Catalog and meta data ? A catalog is a compilation of records elaborating the contents of a particular collection or group of collections. Metadata (Meta data, or someti
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
Multiple-mode locks : It offers two locks: exclusive locks and shared locks. But why do we require these two locks? There are a lot of transactions in the database system that neve
Explain data dictonary on oracle ? Data Dictionary - Data dictionaries are the system tables in which contain descriptions of the database objects and how they are structured.
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
Types Of Indexes One of the words used during the file organisation is the term index. In this part, let us describe this term in more detail. We find the index of keywords
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