Amrit Kaur

acid intention locks exclusive locks shared locks serializability c++ dbms multilevel b+tree hashing cluster index dense index primary index sequential organisation pile file heap organization data file time stamp ordering conflict equivalent precedence graph isolation durability consistency atomicity transaction types of relationship degree of relationship cardinality attributes customer relationship management entity erp er diagram granularity timestamp phantoms unrepeatable reads dirty read lost update acid properties locks recoverability #schedule #transaction transitivity dependecny partial dependency boyce codd third normal form second normal form first normal form normalization fd functional dependencies bcnf 3nf 2nf 1nf records pl/sql cursors ddl create table order by rollup select cube selection where from projection select into group by while loops for continue do while break if else switch case default c++ c++ variables c++ operators c++ keyword c++ constants advantages of dbms dbms vs file based