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Isolation or Independence: The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of other transactions do not affect the outcome of this transaction. For instance, if another transaction that is a withdrawal transaction which withdraws an amount of Rs. 5000 from X account is in progress, While commits or fails, should not affect the outcome of this transaction. Only the state that has been study by the transaction last should verify the outcome of this transaction.
explain at least five widly used case tools
Describe the two alternatives for specifying structural constraints on relationship kinds? Relationship kinds have certain constraints in which limit the possible combination o
Define Two phase commit Two phase commit: To make sure atomicity, all the sites where a transaction is being executed must agree on the final outcome of the execution. The tran
Illustrate different types of Locks in SQL Server. There are three kinds of locks in SQL Server i.) Shared locks - These are used for operations which don't allow any update
What is normalization? It is a method of analysing the given relation schemas based on their Functional Dependencies (FDs) and primary key to attain the properties (1).Minim
A database for the Service and Maintenance (SM) section of a Computer sales and service Company has to be developed. SM gives after sales service to customers. SM branch has a numb
what should be included in this???
What is meant by functional dependencies? Consider a relation schema R and α C R and β C R. The functional dependency α ->β holds on relational schema R if in any legal relati
Describe the Association: Design Before we describe association design let us define association "Association is set of links between two objects in the object model". It is
Define Catalog and meta data ? A catalog is a compilation of records elaborating the contents of a particular collection or group of collections. Metadata (Meta data, or someti
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