What is the difference between a primary index and a
secondary index? What is a duplicate data entry in an index?
Can a primary index contain duplicates?
- 5 Answers
- 30771 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / roshan jha
The index in which the sort order of a search key is similar
to the sort order of a relation then the index is called
primary index.Ex.front index of the book.
While in secondary index the order of the search key is in
different order from the order of the key in file.eg.index
in back side of some book.
Two entries are said to be duplicate if have same
value for the search key field associated.primary index
doesnot have duplicates.
| Is This Answer Correct ? | 27 Yes | 14 No |
Post New Answer View All Answers
How can you log an error to the server event log from a stored procedure?
Explain about the hierarchical model of the database?
1. Using the XML Document below, with the URI “recipe.xml”
define
the following queries in XQuery:
a.) Give the names of all breakfast in the menu.
b.) Select breakfasts that have price lower than $7.00?
What is the physical representation for a many-to-many relationship?
How to customize error conditions.
What are the 18 schemas?
How is data stored in dbms?
What is DB Development software?
How to generate OIDS
State the acid rules?
Write the fastest query to find out how many rows exist in a table?
A) Which two are benefits of Teradata's support for ANSI Standard SQL? (Choose two.) 1.data is distributed automatically 2.queries get optimized to better plans 3.submit queries from other database systems 4.can interface with BI tools B) Which statement is true when comparing the advantages of third normal form to star schema? 1.Star schema tends to have fewer entities. 2.Star schema requires additional data storage. 3.Third normal form tends to have fewer entities. 4.Third normal form requires additional data storage. C)Which two sets of functions does the Parsing Engine (PE) perform? (Select two.) 1.sorting, formatting, and aggregating of the final answer set 2.flow control of the data to and from the participating tables 3.SQL statement interpretation, syntax validation, and semantic evaluation 4.dispatching the step execution sequence to the AMP via the BYNET D) Which two can be achieved with Teradata Active System Management (TASM)? (Choose two.) 1.disable hardware 2.react to hardware failure 3.influence response times 4.collect metadata E) Which three mechanisms can be used to ensure security within the Teradata Database? (Choose three.) 1.views 2.spool limits 3.roles 4.access rights 5.profiles
To convert IDMS to DB2, how to deal with IDMS occurs and redefined clause?
How to use online Backups?
How long can an error message be in raiseerror function?
