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22 Cards in this Set
- Front
- Back
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How can web applications implement transactions?
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By using methods that initiate transaction. (3)
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What are the three methods that web applications implement transactions
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1, initiate the transaction 2. commit the transaction 3. revert the transaction back to the original state |
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What are the formal statements of implementing web applications.
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1. BEGIN TRANSACTION 2.COMMIT 3.ROLLBACK |
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What are some real world examples using and implementing transactions
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1. Banking information and when the power goes out.
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If a system fails, what needs to have functions and features to handle the process
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. The database and the system
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What are three functions in .NET that can be used in a transaction?
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1. BeginTrans 2. CommitTrans 3. RollbackTrans |
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What does BeginTrans do? CommitTrans RollbackTrans |
1. BeginTrans- Starts a new transaction. 2. CommitTrans saves changes and completes transaction. 3. RollbackTrans cancels and changes during the current transaction and ends the transaction |
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What is the most common way to implement transactions?
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1. Through Query Statements handled by the Data Base
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What does the W3C RDF protocol state?
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In a transaction, all process are performed by temporary states. (The are not seen by the clients until commited
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Because the information is not seen by the Client and is in a temporary state you can _________________ the transaction
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Rollback
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What are other ways to implement transaction recall?
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Triggers are a great way to implement transaction recall
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What are triggers? What do they do?
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Triggers are events the occur in the database that cause and action to occur.
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What is an example of a trigger
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1. Save record plus User ID and DateTime to another table. |
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How do you implement a trigger?
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1. Run code as a query in a database once. (After that a trigger will exist.)
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what is an example of a trigger |
CREATE TRIGGER ON FORAS
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An example of the use of a trigger to save the entire tblPerson record into a tblLog table along with the UserID and DateTime of the transaction when the record is updated.
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CREATE TRIGGER trgInsert ON tblPerson FOR INSERT AS INSERT INTO tblLog(USERNAME, FName, LName, Address, City, State, Zip, Now()) VALUES(USERNAME, 'Dan', 'Parrell', '920 Cross Street', 'Oxford', 'Michigan', '48371') |
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Final way to manage transactions is?
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Implement and used the database transaction log file.
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In Microsoft SQL , how are the logs stored
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1. In the order they are created
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How are the server logs stored.
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In the order they were created.
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What will link the log record back to the transaction
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the record identifier.
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A database represents the __________________ of the database at a point in time
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ans. State
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Any changes to the database since the backup are stored?
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Transaction log
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