Answer / nitish sharma

4 types of tables in data dictionary.

i) Transparent tables - Exists with the same structure both in dictionary as well as in database exactly with the same data and fields. Both Opensql and Nativesql can be used.

ii) Pool tables- It is a database table with a special structure that enables the data of many R/3 tables to be stored within it.

iii) Cluster tables - These are logical tables that are arranged as records of transparent tables. one cannot use native sql on these tables (only open sql). They are not manageable directly using database system tools.

iv) Internal tables - Internal table is a temporary table gets created in the memory of application.

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