Answer / sainathraj

The data class determines in which tablespace(physical area)
the table is stored when it is creted in the database

Answer / vijaypamulapati

Hi see this link it will useful to you.

Regards,
Vijay.

http://help.sap.com/saphelp_nwpi71/helpdata/en/cf/21eac5446011d189700000e8322d00/content.htm

Answer / abaper

The data class corresponds to a physical area in which all the tables assigned to this data class are stored.
Below are the 3 data classes
APPL0 (master data)
APPL1 (transaction data)
APPL2 (organizational data)

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