What is Internal table?
Internal tables are table objects that only exist for the runtime of the program. There are several ABAP statements for working with internal tables, for example, append, insert, delete, or find lines.
The number of lines of an internal table is extended dynamically at runtime as required.
You can use internal tables for table calculations on subsets of database tables. For example, you can read a part of one or more database tables into an internal table.
They also allow you to reorganize their contents to suit the needs of your program. You can, for example, read particular entries from one or more large customer tables into an internal table, and then use them to create a list. When you run your program, you can access this data directly, instead of having to search for each record in the database.
