- What is rollback and commit?
- What are the advantages and disadvantages of online transaction?
- What are the after triggers?
- Can we rollback after commit?
- What is the main purpose of online transaction?
- What is the safest online payment method?
- Which of the following are the advantages of transaction concurrency?
- Why do we use transactions in SQL?
- Why transaction processing system is important?
- What are the different in triggers?
- When should Transaction be used?
- What is the benefit of transaction?
- Why transactions are important operation in a DBMS?
- Which of the following is a transaction isolation?
- What are 5 bad things about online banking?
What is rollback and commit?
Difference between the COMMIT and ROLLBACK A COMMIT statement is used to save the changes on the current transaction is permanent.
A Rollback statement is used to undo all the changes made on the current transaction..
What are the advantages and disadvantages of online transaction?
Read these examples:Low labour costs. Since online payments are usually automatic, they have lower labour costs than manual payment methods, such as cheque, money order, cash and EFTPOS.Convenience for online sales. … Automatic. … Fast transaction speed. … Low risk of theft.Feb 6, 2017
What are the after triggers?
What are the after triggers? Explanation: AFTER TRIGGERS can be classified further into three types as: AFTER INSERT Trigger, AFTER UPDATE Trigger, AFTER DELETE Trigger. Explanation: Example : declare @empid int; where empid is the variable.
Can we rollback after commit?
A transaction is a sequence of SQL statements that Oracle Database treats as a single unit. … After you commit the transaction, the changes are visible to other users’ statements that execute after the commit. You can roll back (undo) any changes made during the transaction with the ROLLBACK statement (see ROLLBACK.
What is the main purpose of online transaction?
Answer: Online transactions allow people to save many items, such as paper used to make notes, time spent on transactions & counting. Online transactions are very simple and can be performed from wherever using devices that are readily accessible to everybody, such as smartphones, laptops, and so on.
What is the safest online payment method?
By and large, credit cards are easily the most secure and safe payment method to use when you shop online. Credit cards use online security features like encryption and fraud monitoring to keep your accounts and personal information safe.
Which of the following are the advantages of transaction concurrency?
Which of the following are the advantages of transaction concurrency? Explanation: Concurrency in transactions allow increased throughput, utilization. They also reduce average response time. Explanation: The average time for a transaction to be completed after it has been submitted is called as Average response time.
Why do we use transactions in SQL?
For any business, transactions that may be comprised of many individual operations and even other transactions, play a key role. Transactions are essential for maintaining data integrity, both for multiple related operations and when multiple users that update the database concurrently.
Why transaction processing system is important?
Transaction processing systems provide the following functions: … Transaction processing systems provide an execution environment that ensures the integrity, availability, and security of data. They also ensure fast response time and high transaction throughput.
What are the different in triggers?
In SQL Server we can create four types of triggers Data Definition Language (DDL) triggers, Data Manipulation Language (DML) triggers, CLR triggers, and Logon triggers.
When should Transaction be used?
You use transactions when you have a group of actions that must be atomic (either all succeed or none succeed) Wrapping these actions in a transaction allows you to rollback actions that have already succeeded when you encounter an error.
What is the benefit of transaction?
The use of TPS in organizations is a key feature in improving customer service and satisfaction. A TPS allows for the user/customer to have a level of reliability and confidence during transactions. TPS is swift and cost-effective. The use of TPS in businesses minimizes the occurrence of error during data transactions.
Why transactions are important operation in a DBMS?
A transaction is a very small unit of a program and it may contain several lowlevel tasks. A transaction in a database system must maintain Atomicity, Consistency, Isolation, and Durability − commonly known as ACID properties − in order to ensure accuracy, completeness, and data integrity.
Which of the following is a transaction isolation?
Which of the following is a transaction isolation level as specified by SQL standard? Explanation: Serializable, repeatable read, read committed and read uncommitted are the four levels of transactions. … Explanation: Read committed allows only committed data to be read, but does not require repeatable reads.
What are 5 bad things about online banking?
The 5 Biggest Mistakes You Can Make Banking OnlineIgnoring your accounts. Set aside a few minutes each day to monitor the activity in your checking and savings accounts. … Having a standard password. … Being careless with your phone. … Shunning security features. … Assuming the worst about online banking.Mar 8, 2016