In SQL data consistency is that whenever a transaction is performed, it sees a consistent database. During the transaction, if the database is not consistent, then there are two reasons for it, which are as follows:
1-database failure (software or hardware failure)
2-multiple accesses
data consistency makes sure data integrity and vice versa.
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what do u mean by lossiess join in dbms
multivalued data
save point saves the dbms and check point simply check the database thats it simple
TUPLE : Is the "ROW" in a table