Interested to Buy Any Domain ? << Click Here >> for more details...
Describe the Index, Types of index, At what situation we
have used? Which one s better than others?
- 1 Answers
- 3656 Views
- IBM, TCS, I also Faced
- E-Mail Answers
Answer / oraclem
Index is a DB object that makes data retrieval faster.Index created on column and that column is called index key.
Types of index:
1)BTREE Index
2)BITMAP index
Purpose of creating INDEX: Oracle will take more time to locate the record,to improve the performance of the quesry we have to create the Index.
IF we do not mention the type of index,by default oracle will take BTREE as default Index.
| Is This Answer Correct ? | 1 Yes | 0 No |
What is mutating trigger?How to avoid it??
What is difference between hql and sql?
What are the key differences between SQL and PL SQL?
What data types does pl/SQL have?
what the meaning of sql
How does cross join work?
What is the difference between pl and sql?
What is the purpose of a secondary key?
Explain the order of sql statement execution?
Can we join two tables without common column?
What is the use of desc in sql?
What is a dirty read sql?
-
Oracle (3259) - SQL Server (4518)
- MS Access (429)
- MySQL (1402)
- Postgre (483)
- Sybase (267)
- DB Architecture (141)
- DB Administration (291)
- DB Development (113)
- SQL PLSQL (3330)
- MongoDB (502)
- IBM Informix (50)
- Neo4j (82)
- InfluxDB (0)
- Apache CouchDB (44)
- Firebird (5)
- Database Management (1411)
- Databases AllOther (288)
