Interested to Buy Any Domain ? << Click Here >> for more details...
What is INDEX Concept. What is Primary Index and Secondary
Index and Difference between Primary & Secondary Index
- 1 Answers
- 27489 Views
- Satyam, Vistex, I also Faced
- E-Mail Answers
Answer Posted / uma mb
Index on a table or indexing a table can speed up record
access in the table. Index is a copy of the database table
but in its reduced form (only certain key fields exist in
the index along with a pointer)The data stored in the index
is in a sorted order of the primary key in a primary index
and secondary (alternate) key in a secondary index.
Primary index is automatically created when the table is
activated after creation. A secondary index is created
manually (by ABAP developer or admin person as per dictates
of the workshop) if it is felt that a large table is
accessed too many times based on some field (like employee
name in the EMPLOYEE MASTER) or fields that do not
participate in the primary key formation.
It is possible to specifiy while creating secondary index if
this index should be created on table activation. And then
these secondary indexes can give a performance gain only on
certain database systems and therefore these database
systems can be specified while creating the secondary index
so that such an index is created only on those specific
database systems. Also user created secondary indexes must
begin with Y or Z and can have three character position
names. Must not use 0 (zero) as this is reserved by SAP for
primary index.
| Is This Answer Correct ? | 28 Yes | 5 No |
Post New Answer View All Answers
How do you find number of records present in internal table?
What is the function module for INDIAN PAYROLL to read table cluster for given cluster table and sequence number?
How many types of data classes are there in sap abap? : abap data dictionary
Can matchcode object contain ids with different update types? : abap data dictionary
What are the fields in a bdc_tab table? : abap bdc
Explain the disadvantage of using exec sql statement in abap?
How many ways you can create table? : abap data dictionary
how do you call third selection screen ?
What is the different type of projects? : sap abap hr
What is alv programming in abap? When is this grid used in abap? : abap hr
What are local objects?
What is luw or data base transaction ?
Difference between BDC vs Direct Loads?
How can we declare a table control in the abap/4 program?
What does an exec sql statement do in abap?
