Answer / krithika

internal table is a temporary storage area that exists only
at program runtime.

Types
1.standard.
The key access to the standard table is always linear
search.It has non unique key.Append , insert and collect
work.It has linear index operation.
2.sorted.
This table is always internally sorted.
append with improper order can produce arror.use either
unique or non-unique key. always use binary search.

3.hashed.
It has unique key.no index.always use hash algorithm.
append and collect will not work.

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