Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
This is type of indexing which is based on sorted ordering values. Various ordered indices are primary indexing, secondary indexing.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Heuristic is a rule that leads to least cost in most of cases. Systems may use heuristics to reduce the number of choices that must be made in a cost-based fashion.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
For selection operation, the file scan is an important activity. Basically file scan is a based on searching algorithms. These searching algorithms locate and retrieve the records that fulfills a selection condition.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
There are multiple possible evaluation plans for a query, and it is important to be able to compare the alternatives in terms of their estimated cost and choose the best plan.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Query processing is a collection of activities that are involved in extracting data from database.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
The problem with static hashing is that it does not expand or shrink dynamically as the size of the database grows or shrinks.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
In this method of hashing, the resultant data bucket address will be always same.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Hash file organization method is the one where data is stored at the data blocks whose address is generated by using hash function.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
B-tree indices are similar to B+-tree indices. The primary distinction between the two approaches is that a B-tree eliminates the redundant storage of search-key values.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
The B+ tree is similar to binary search tree. It is a balanced tree in which the internal nodes direct the search.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
An index on a set of fields that includes the primary key is called a primary index. The primary index file should be always in sorted order.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
An index is a data structure that organizes data records on the disk to make the retrieval of data efficient.