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Concurrency Identification
While designing analysis, model we map real world model into our analytical model. Real life objects are simultaneous in nature, but all the design model objects are not concurrent in nature, as single process may support multiple objects.
What is a Transaction? A transaction is an event which happens on the database. Generally a transaction reads a value from the database or writes a value to the database. If y
Timestamps For Read operations: If TS (T) If TS (T) >= W-timestamp (Q), then the transaction T is trying to read a value of data item Q which has been written and committed
What are the types of storage devices? Primary storage Secondary storage Tertiary storage Volatile storage Nonvolatile storage
describe all the tables you have created. ?get table_name, status, num_rows, user_stats in user_tables system view ?get table_name, constraint_name, constraint_type in user_constr
The ER diagram clearly showing the additional tables you have implemented. SQL table creation scripts for the tables you have set up. SQL scripts showing the sample data you
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
explain in detail about time stamp orderting/
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
define locking in simple language and decribed it
what is file organization? what are file organization techniques.explain in detail? explain random file organization technique, multikey file organization technique?what is indexin
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