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Is an index important for spatial database management?
BenVanKesteren
indices r required 4 efficent acces 2 spatial data.traditional index structure sucha as hash indices nd b-trees ,r not suitable since they used 4 only 1-d data,whereas spatrial data r typically 2 or more dimensions.
Placid04
muzaffarpur,bihar,march 2012
Wiki User
∙ 12y ago
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What is a spatial database index?
k-d tree,Quadtree,R-tree. Placid04. Bakhra. Muzaffarpur, bihar,march 2012.
What is the need for aggregation?
Aggregation is an important concept in database design where composite objects can be modelled during the design of database applications. Therefore, preserving the aggregation concept in database implementation is essential. In this paper, we propose models for implementation of aggregation in an Object-Relational Database Management System (ORDBMS) through the use of index clusters and nested tables. ORDBMS is a commercial Relational Database Management Systems (RDBMS), like Oracle, which support some object-oriented concepts. We will also show how queries can be performed on index clusters and nested tables.
How index increase the performance of database?
Index on a table in the database is just like an index (or content page) in a book - a quick look at an index can tell you where the actual data is located. This saves time and cost of scanning the whole table, thus making the database faster.
What serves as an index of office or records?
It is a database, either a manual card index or an electronic computer system.
What is another word for database?
The word database is a noun that means a collection of data. Some words that are synonyms for database are directory, index, and table.
Is a database software or hardware?
A database, as used by a computer, is a software programme that is used to store data (information). A card index is also a database, written on pieces of card - so, technically, a card index is a physical thing (hardware?), possibly.
What are the components of relational database?
Table, index, trigger and column Table, index, trigger and column
What are the ways of preventing duplicate values in a field?
Vague question, but if you are talking about a database field, the simple way is to create a unique index on the field (if the database supports it). The index will not allow duplicate values to be added to the database for that field and will generate an error if somebody tries.
What is used to uniquely identify a record in a database program?
index field
Which database object does NOT contain data?
Database indexes do not contain data; they are structures that improve the speed of data retrieval.
What is the meaning of the file extension CDX?
CDX are theCompound Index File. CDX are Index of files or other data contained in a database; similar to a compact index (.IDX) file, but the leaf nodes at the lowest level of a compound index point to one of the tags in the index. . Such kind of files can be opened by Microsoft Visual FoxPro or Any other database compatible software.
What is meant by key in database?
A key is a unique part of the record that is used to index.
