Titlebook: Oracle SQL Revealed; Executing Business L Alex Reprintsev Book 2018 Alex Reprintsev 2018 PL/SQL.MODEL clause.CONNECT BY.Query Transformatio

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Row Pattern Matching: match_recognizeThis is required in many business areas, for example, security applications and fraud detection or financial applications and pricing analysis. Native pattern-matching capabilities in SQL help to avoid complex bespoke solutions on the client side or within the middle-tier application server and use easy-to-share SQL queries instead.

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Joinsom the end user, but the database accesses multiple tables anyway to get the result set. It’s not necessary that data from all tables in a query appear in the result; some tables may be used to filter out data from other tables, for example.

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Aggregate Functionse group is a set of rows with the same values for all expressions specified in “group by.” Each row belongs to one and only one group. If “group by” is not specified, then the entire recordset is a single group, and in this case query always returns one row even if the recordset to be grouped is empty.

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Solving SQL Quizzesf the tasks will vary a lot as well as the depth of analysis for different solutions. For a few tasks there will be both SQL and PL/SQL solutions, but the main accent in this chapter is on SQL capabilities.

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st nach der Kompression, da bei Anwendung von feuchtem Ausgangs- gas das Wasser zu einem erheblichen Teil bei der Druckerh?hung ausge- schieden werden kann. Um diesen Proze? m?glichst wirksam zu gestalten, mu? natürlich die Kompressionsw?rme des Gases und die Kondensations- w?rme des Wassers abgefüh

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