Computers and Technology

Computers and Technology, 26.10.2019 02:43, julia158

Suppose a database manager were to allow nesting of one transaction inside another. that is, after having updated part of one record, the dbms would allow you to select another record, update it, and then perform further updates on the first record. what effect would nesting have on the integrity of a database? suggest a mechanism by which nesting could be allowed.

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Computers and Technology, 21.08.2019 16:20, kayliebug2003

Suppose that we have an existing transaction database tdb for which we have already mined the frequent patterns. also we have a new set of transaction δtdb that we are adding to tdb. given a ﬁxed min support threshold, σ (e.g., σ = 0.5%), present in plain language the steps for an efficient incremental mining algorithm that can maximally use the previously mined information when a new set of transactions δtdb is added to the existing transaction database tdb.

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Computers and Technology, 11.09.2019 23:20, zitterkoph

Suppose that we have an existing transaction database tdb for which we have already mined the frequent patterns. also we have a new set of transaction δtdb that we are adding to tdb. given a ﬁxed min support threshold, σ (e.g., σ = 0.5%), present in plain language the steps for an efficient incremental mining algorithm that can maximally use the previously mined information when a new set of transactions δtdb is added to the existing transaction database tdb.

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Computers and Technology, 17.09.2019 00:30, brenton14

In a transaction-processing system (tps), if the tps database can be queried and updated while the transaction is taking place, this is called processing.

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Computers and Technology, 17.09.2019 20:00, andreal7915

Discuss the differences between a data definition language (ddl) and a data manipulation language (dml). what operations would you typically expect to be available in each language? describe the main characteristics of the database approach and the file-based approach. contrast the two different approaches. provide a definition for a physical database designer, data administrator and a database administrator. what role do they play for the database? what types of interactions would these users of the database have? what is concurrency control and why does a dbms need a concurrency control facility? what is a database transaction? give 2 examples of a transaction. what is meant by the term ‘client-server architecture’ and what are the advantages of this approach? what is a transaction processing monitor? what advantages does a tp monitor bring to an oltp environment? define logical data independence and physical database independence. how do they relate to the ansi-sparc database architecture. define cloud computing. name and define the two principal integrity rules for the relational model. describe the differences between a view and a base relation.

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