What are the objects of a database? Explain any three.
Answers
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A database object is any aspect of a database that you can use to manipulate or hold data. In other words, that covers a wide variety of objects - anything from a saved search to a table could be a database object.
- Most of the major database engines offer the same set of major database object types:
- Tables
- Indexes
- Sequences
- Views
- Synonyms
Although there are subtle variations in the behavior and the syntax used for the creation of these major database object types, they are almost identical in their concept and what they mean. A table in Oracle behaves almost exactly as a table in SQL Server. This makes work much easier for the database administrator. It is analogous to moving from one car to another made by a different manufacturer; the switches for turning the headlights on may be in different locations, but the overall layout is broadly similar.
Answer:
Table – Basic unit of storage; composed rows and columns
View – Logically represents subsets of data from one or more tables
Sequence – Generates primary key values
Index – Improves the performance of some queries
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