Interested to Buy Any Domain ? << Click Here >> for more details...
What is a transaction and what are ACID properties?
- 14 Answers
- 77353 Views
- Config Systems, IBM, TCS, Virtusa, I also Faced
- E-Mail Answers
Answer Posted / sonu
A transaction is a sequence of sql Operations,
work as single atomic unit of work. To be qualify
as a "Transaction" , this sequence of operations must satisfy 4 properties , which is knwon as ACID test.any database must follow these acid properties.
Atomicity:-The sequence of operations must be atomic,
either all or no operations are performed.
Consistency:- When completed, the sequence of operations
must leave data in consistent mode. All the defined
relations/constraints must me Maintained.
Isolation: A Transaction must be isolated from all other
transactions. A transaction sees the data before the
operations are performed , or after all the operations has
performed, it can't see the data in between.
Durability: All oprtaions must be permanently placed on
the system. Even in the event of system failure , all the
operations must be exhibit.
| Is This Answer Correct ? | 7 Yes | 10 No |
Post New Answer View All Answers
What stored by the model? : sql server database administration
What is row-level compre?
What is temporal table?
Define cross join in sql server joins?
This question asked during interview, 2) At the end of each month, a new table is created for each bank that contains monthly metrics consolidated at the account level. The table naming convention is bankX_YYYYMM where X represents the numeric designation of the bank and YYYYMM indicates the 4 digit year and 2 digit month. The tables contain the following fields: name data type description account text account number registered boolean indicates whether the account is registered num_trans integer number of transactions made during the time period spend numeric(9,2) total spend during the time period a) Write a SQL query that will display the total number of transactions and total spend for "Bank1" during the 4th quarter of 2009. b) Write a SQL query that will display the total number of transactions and total spend at "Bank1" and "Bank2", broken out by registered vs. non-registered accounts, during January 2010 not sure what is correct answer and how to solve?
Tell me the use of keyword with encryption. Create a store procedure with encryption?
what is the primary use of the model database? : Sql server administration
Explain log shipping and mention its advantages.
What type of Index will get created after executing the above statement?
When does the auto update index statistics feature in sql server turn itself on?q) what specific conditions database should meet, before you can bulk copy data into it using bcp?
What is the use of sql profiler in sql server 2012?
What is 1nf 2nf?
Create and insert into temp table in sql server?
What objects does the fn_my_permissions function reports on? : sql server security
What extended events?
