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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.
Suppose an instruction takes 1 nanosecond to execute (on average), a page fault takes 20 microseconds of processor time, and it takes 300 microseconds of disk time to read or write
Whst is logical schema ? Logical schema is the entire database.
Consider the E/R schema with weak entity sets shown below. Come up with the SQL CREATE TABLE statements (with appropriate primary key, unique and foreign key constraints). Include
growing phase and shrinking phase are disjoint, why ?
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
What are the types of storage devices? Primary storage Secondary storage Tertiary storage Volatile storage Nonvolatile storage
I need a help with my assignment of data envelopment analysis which is due for submission next week on monday the 10th Dec. Will you be able to help so that I can submit it on tim
What is a B+-Tree index? A B+-Tree index takes the form of a balanced tree in which each path from the root of the root of the root of the tree to a leaf of the tree is of the
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
The database files accept the actual data and are typically the biggest in size. Depending on their shape, the tables for all the user operation can go in one database file-but
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