save point saves the dbms and check point simply check the database thats it simple
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even though both these commands are related to the structure of the table...,we can regain the data when we use use drop command by use of rollback command but its not possible in the case of truncate command.
what do u mean by lossiess join in dbms
multivalued data
sdfsfas
TUPLE : Is the "ROW" in a table