Answer Posted / srikanth@bigtec

Difference between structure and table type is

Table type

The table type specifies how you can access individual table
rows via ABAP.
Generally all internal tables are treated as table types.
There are different types of table types like
standard,sorted and hashed.

Internal tables are used only during program execution i.e
data flows into internal table only during program execution.
Data manipulations in internal table during debugging will
not effect database.No memory is allocated for table types
like internal table.

structure

Structure contains data only when it is inserted in database
table using append or include.
We change the data in structure which will effect Database.
Memory is allocated to structure only when it is included in
table using append or include.

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