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Differentiate between a subquery and a join
If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are to appear in the result table are from different tables after that a join must be employed.
external and internal mapping with examples
With the linear commit protocol, sites are connected in a chain, and the subtransaction at the left-hand end of the chain initiates the protocol. Propose a crash recovery protocol
Explain the Query Processing Data Query Processing permits a user to report or analyze structured and unstructured data pulled from multiple data sources.
Explain the Static or conservative Two Phase Locking: Static (or conservative) Two Phase Locking: In this type of scheme, all the data items are locked earlier than any opera
Explain the Strategy of Database Planning ?
what do you mean by primary key constraint?
a brief definition
Consider an information system designed for an online company which provides IT products and services These include desktops, laptops, networking products, IT books, parts, and
how to solve the C type problems?
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
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