Podcast
Questions and Answers
______ outlines the introduction of transaction concepts
______ outlines the introduction of transaction concepts
Outlines
A transaction is a mechanism for applying the desired modifications/operations to a ______
A transaction is a mechanism for applying the desired modifications/operations to a ______
database
Changes made in real time to a database are called ______
Changes made in real time to a database are called ______
transactions
Transaction processing system manages transactions and controls their access to a ______
Transaction processing system manages transactions and controls their access to a ______
______ Problem is one of the transaction anomalies that can occur
______ Problem is one of the transaction anomalies that can occur
______ is a problem where one transaction reads data that is being modified by another transaction
______ is a problem where one transaction reads data that is being modified by another transaction
If there is no cycle in the graph, the schedule is equivalent with some serial schedule and is __________
If there is no cycle in the graph, the schedule is equivalent with some serial schedule and is __________
A single SQL statement is always considered to be __________
A single SQL statement is always considered to be __________
Either the statement completes execution without error or it fails and leaves the database __________
Either the statement completes execution without error or it fails and leaves the database __________
Every transaction has three characteristics: Access mode, Diagnostic size, and __________
Every transaction has three characteristics: Access mode, Diagnostic size, and __________
If the access mode is READ ONLY, INSERT, DELETE, UPDATE & CREATE commands cannot be executed on the database. The default is READ WRITE unless the isolation level of READ UNCOMMITTED is specified, in which case READ ONLY is __________
If the access mode is READ ONLY, INSERT, DELETE, UPDATE & CREATE commands cannot be executed on the database. The default is READ WRITE unless the isolation level of READ UNCOMMITTED is specified, in which case READ ONLY is __________
Diagnostic size n, specifies an integer value n, indicating the number of error conditions that can be held simultaneously in the diagnostic __________
Diagnostic size n, specifies an integer value n, indicating the number of error conditions that can be held simultaneously in the diagnostic __________
No changes are saved to the database until the transaction completes successfully. After a transaction successfully completes, changes to data persist and are not undone, even in the event of a system failure. This ensures the ______ property.
No changes are saved to the database until the transaction completes successfully. After a transaction successfully completes, changes to data persist and are not undone, even in the event of a system failure. This ensures the ______ property.
For example, in an application that transfers funds from one account to another, the durability property ensures that the changes made to each account will not be reversed. A transaction is an atomic operation from the users’ perspective. But it has a collection of operations and it can have a number of states during its execution. A transaction can end in three possible ways. Successful Termination: when a transaction completes the execution of all operations in it and reaches the COMMIT command. Suicidal Termination: when the transaction detects an error during its processing and decide to abrupt itself before the end of the transaction and perform a ROLL BACK Murderous Termination: When the DBMS or the system force the execution to abort for any reason. And hence, rolled back. Ways of Transaction Execution. In a database system many transactions are executed. Basically there are two ways of executing a set of transactions. Serially: In a serial execution transactions are executed strictly ______.
For example, in an application that transfers funds from one account to another, the durability property ensures that the changes made to each account will not be reversed. A transaction is an atomic operation from the users’ perspective. But it has a collection of operations and it can have a number of states during its execution. A transaction can end in three possible ways. Successful Termination: when a transaction completes the execution of all operations in it and reaches the COMMIT command. Suicidal Termination: when the transaction detects an error during its processing and decide to abrupt itself before the end of the transaction and perform a ROLL BACK Murderous Termination: When the DBMS or the system force the execution to abort for any reason. And hence, rolled back. Ways of Transaction Execution. In a database system many transactions are executed. Basically there are two ways of executing a set of transactions. Serially: In a serial execution transactions are executed strictly ______.
Lost Update Problem occurs when two transactions try to update the same data concurrently without proper ______.
Lost Update Problem occurs when two transactions try to update the same data concurrently without proper ______.
Uncommitted Dependency Problem arises when one transaction reads data that is being modified by another transaction that has not yet ______.
Uncommitted Dependency Problem arises when one transaction reads data that is being modified by another transaction that has not yet ______.
Inconsistent Analysis Problem can happen when a transaction reads data that is in the process of being ______ by another transaction.
Inconsistent Analysis Problem can happen when a transaction reads data that is in the process of being ______ by another transaction.
Transaction support in SQL helps in maintaining the integrity and consistency of data by providing features like ______, COMMIT, and ROLLBACK.
Transaction support in SQL helps in maintaining the integrity and consistency of data by providing features like ______, COMMIT, and ROLLBACK.
