What is an index and types of indexes. How many number of
indexes can be used per table ?
Answer Posted / guest
Index is a method used for faster retrieval of
records.different types of indexes are
1.primary key index
2.unique index
3.bitmap index
4.hash index
5.function based index
6.B-tree index(default index created) on table.
7.Virtual index(which do not show entry in DBA_segment).
Is This Answer Correct ? | 128 Yes | 35 No |
Post New Answer View All Answers
Differentiate between pl/sql and sql?
What is the difference between subquery and correlated query?
Write a unique difference between a function and a stored procedure.
What is sql used for?
How to test for null values?
C. Normalize the following data up to the 3rd Normal form. Create the tables and insert the data given. Emp_ID Name Dept_Name Salary Course_Title Date_Completed 100 Adam Marketing 48,000 SPSS 6/19/2008 Surveys 10/7/2008 140 Bob Accounting 52,000 Tax Acc 12/8/2008 110 Cathy IT SQL Server 1/12/2008 C# 4/22/2008 190 Dan Finance 150 Emily Marketing 55,000 SPSS 6/16/2008 42,000 Analysis 8/12/2008 Queries 1. Find all Names who have completed the SPSS Course. 2. Find employee with max salary. 3. Find employee with 2nd max salary. 4. Find all employees in Dept “Marketing”. 5. Find all the employees who have taken more than 2 courses. 6. Find all the employees who have completed the courses before month of September.
What is the advantage of index in sql?
Explain the select statement in sql?
how to calculate the difference between two dates? : Sql dba
How to select unique records from a table?
Does view store data in sql?
how to present a past time in hours, minutes and seconds? : Sql dba
What is the use of <> sql?
What is data types in sql?
How much does sql certification cost?