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151 results:

81. XQuery | FLWOR structure | Let and For clause

Let and For clause Let and for clauses enable the binding of variables to results of any XQuery expressions, whereby, as shown in the further course, the results of path expressions are…

82. XPath | XPath introduction | The predicate evaluation

The predicate evaluation The following pages are from the German book "XQuery – Grundlagen und fortgeschrittene Methoden" (XQuery – basics and advanced methods). The…

83. XQuery | FLWOR structure | Binding of several variables

Binding of several variables In a FLWOR expression it is possible to bind simultaneously several variables by a let or a for instruction. let $x := ..., $y := ... for $x…

84. About us | Our team | Brief vita of Mehrschad Zaeri Esfahani

Brief vita Mehrschad Zaeri Esfahani has studied Computer Science (Dipl.-Inform. FH) and Philosophy (Ethikum for engineers) at the Karlsruhe University of Applied Sciences. After…

85. XQuery | FLWOR structure | Explicit type testing

Explicit type testing As a further property of the for and let clauses, there is the possibility to perform a type testing via an explicit type declaration by means of the additional key…

86. XQuery | FLWOR structure | Where clause

Where clause Analogous to the SELECT-FROM-WHERE block in a SQL query, the where clause of XQuery enables the filtering of the data streams. If the expression of a where…

87. XQuery | FLWOR structure | order-by clause

Order-by clause The order in which the return clause of a FLWOR expression is evaluated with the appropriate variable allocation can be explicitly enforced by the sorting clause order by.…

88. XQuery | FLWOR structure | Cancellation of the sorting

Cancellation of the sorting If, from the view of the application, a sorting is completely refused, it can be communicated to the system with the help of the fn:unordered() function.…

89. XQuery | FLWOR structure | Return clause

Return clause The return clause of a FLWOR expression indicates to some extent the template according to which the result document shall be constructed. An important point to…

90. XQuery | FLWOR structure | Nesting of FLWOR expressions

Nesting of FLWOR expressions For the illustration of nested FLWOR expressions in return clauses, the query pattern of the pivoting of XML documents is used as an example. Concretely, a…

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