Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Example:; transfers transfer_amount from x's account to y's account
; Supposes x&y both accounts exist
TRANSACTION (x, y, transfer_amount)
Start transaction
IF X AND Y exist then
READ x.balance
IF x.balance > transfer_amount THEN
x.balance = x.balance - transfer_amount
READ y.balance
y.balance = y.balance + transfer_amount
COMMIT
ELSE DISPLAY ("BALANCE IN X NOT OK") ROLLBACK
ELSE DISPLAY ("ACCOUNT X OR Y DOES NOT EXIST") End_transaction
Please note the use of 2 keywords here COMMIT and ROLLBACK. Commit makes sure that all the modifications made by transactions are made permanent. ROLLBACK ends the transactions and discards any change made by the transaction. Transactions have definite desirable properties. Let us see into those properties of a transaction.
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
Should I select imaging software that allows changes? An imaging system should not give features to edit or alter images. Images generally are formed as safe and secure records
Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke
what is object-identity
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
Entities Let us first be aware of the question: What are entities? An entity is an object of concern used to show the things in the actual world, e.g., table, car, bo
What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When
#floating point representation is used to store
Write an sql statement to find what is the percentage of home policies which are from the state of Arizona out of all Home policies by Policy Value.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd