SAP Internal Tables Interview Preparation Guide
Download PDF
Add New Question

SAP Internal Tables Interview Questions and Answers will guide us that Internal tables provide a means of taking data from a fixed structure and storing it in working memory in ABAP. Data is stored line by line in memory, and each line has the same structure. In ABAP, internal tables fulfill the function of arrays. Since they are dynamic data objects, they save the programmer the task of dynamic memory management in his or her programs. Learn SAP Internal Tables with Interview Questions Guide

15 SAP Internal Tables Questions and Answers:

1 :: What is the basic difference internal tables and database tables?

The basic difference is database tables are stored in DB server and the internal tables are virtual tables these are created run time only Internal tables are created dynamically, the memory of internal tables is not permant memory, for internal tables the memory will be created in the application server and it is external memory and terminates after the program termination.
Post Your Answer

2 :: How to eliminate duplicate entries in internal tables?

SORT itab.DELETE ADJACENT DUPLICATES FROM itab COMPARING ALL FIELDS.
Post Your Answer

3 :: What is SAP Internal Tables Line type?

The line type of an internal table can be any data type. The data type of an internal table is normally a structure. Each component of the structure is a column in the internal table. However, the line type may also be elementary or another internal table.
Post Your Answer

4 :: What is SAP Internal Tables Key?

The key identifies table rows. There are two kinds of key for internal tables - the standard key and a user-defined key. You can specify whether the key should be UNIQUE or NON-UNIQUE. Internal tables with a unique key cannot contain duplicate entries. The uniqueness depends on the table access method.

If a table has a structured line type, its default key consists of all of its non-numerical columns that are not references or themselves internal tables. If a table has an elementary line type, the default key is the entire line. The default key of an internal table whose line type is an internal table, the default key is empty.

The user-defined key can contain any columns of the internal table that are not references or themselves internal tables. Internal tables with a user-defined key are called key tables. When you define the key, the sequence of the key fields is significant. You should remember this, for example, if you intend to sort the table according to the key.
Post Your Answer

5 :: What is SAP Internal Tables type?

The table type determines how ABAP will access individual table entries. Internal tables can be divided into three types:

Standard tables have an internal linear index. From a particular size upwards, the indexes of internal tables are administered as trees. In this case, the index administration overhead increases in logarithmic and not linear relation to the number of lines. The system can access records either by using the table index or the key. The response time for key access is proportional to the number of entries in the table. The key of a standard table is always non-unique. You cannot specify a unique key. This means that standard tables can always be filled very quickly, since the system does not have to check whether there are already existing entries.
Post Your Answer
Add New Question