Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Describe the storage structure of indexed sequential files and their access method.
Ans: Storage structure of Indexed Sequential files and their access: To achieve fast random access to records in a file, we can utilize an index structure. An index record contains a search key value and pointers to data records that is related with a specific search key. An ordered index stores the values of the search keys in sorted order. A file may have various indices on different search keys. If the files consisting of the records are sequentially ordered, a primary index is an index whose search key also describes the sequential order of the file. Such types of files are termed as index sequential files. There are two sorts of ordered indices: dense and sparse. In dense index, and index record appears only for a few of the search-key in the files as displayed below.
To access a specific record with search key value, K, by using dense index we search index record along with search key value, K, by which reach the first entry of data record along with search key value K. After that the data records are searched linearly to acquire the required record. If either the index record is not there or the linear search arrive the data record with different search key value, then the record is not there. Here now for sparse index, we search index record along with search key value, K or the index record with highest search key value less as compared to K, from which arrives the first entry of data record with search key value K or highest value less than K. After that the data records are searched linearly to acquire the required record. If the linear searches the data record with search key value greater as compared to K, then the record is not there.
Give detail description on Transactions. - Using transactions we can group all SQL commands into a single unit. - Transaction begins with some task and finishes only when a
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
Project Description: I am updating my Javascript + HTML website with five domains for the same website I would like to know if I want to create site map and submit it in all the
losers with new information systems
Failure Controlling Methods: Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recov
Function requirement as given: 1> manage fans and likes and followings those information from facebook. twitter. google+ and linkedin etc 2> Organize the clients from email m
please give me introduction to full data in D B M S in a short assignment
What is Asterisk in SQL? Asterisk (*): In SQL, the columns for all the tables and views in the FROM clause will be displayed.
Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.
Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd