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 ______
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______ Problem is one of the transaction anomalies that can occur
______ Problem is one of the transaction anomalies that can occur
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______ 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
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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 __________
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A single SQL statement is always considered to be __________
A single SQL statement is always considered to be __________
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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 __________
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Every transaction has three characteristics: Access mode, Diagnostic size, and __________
Every transaction has three characteristics: Access mode, Diagnostic size, and __________
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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 __________
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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 __________
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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.
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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 ______.
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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 ______.
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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 ______.
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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.
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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.
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