using parallel hints in oracle 10g
advanced sql functions in oracle 10g
... string has leading and trailing spaces ') FROM dual Which gives: TRIM('THISSTRINGHASLEADINGANDTRAILINGSPACES This string has leading and trailing spaces Both the leading and trailing ... returns part of a string. The general syntax of the function is as follows: SUBSTR(original string, begin [,how far]) An original string is to be dissected beginning at the begin character. If no ... counting backward for nine characters, then retrieving five characters from that point. Often in string handling, SUBSTR and INSTR are used together. For example, if we had a series of names in...
Ngày tải lên: 01/06/2014, 01:08
advanced sql Functions in Oracle 10G phần 2 potx
... clauses in analytical functions are most easily explained by way of examples, so let’s begin with the row numbering and ranking functions. The Row-numbering and RankingThe Row-numbering and Ranking Functions There ... it is in the above example: “RANK().” The <analytic clause> part of the function will contain an ordering, partition - ing, or windowing clause. The ordering clause is illustrated in the ... in ranking. First, recall that the format of an analytical function is this: function() OVER(<analytic clause>) where <analytic clause> contains ordering, partition - ing, windowing,...
Ngày tải lên: 08/08/2014, 18:21
advanced sql Functions in Oracle 10G phần 4 ppt
... (i.e., a “window”) and reporting the result in one “window row.” An example of this tech - nique would be in applications where one wants to smooth data by finding a moving average. Moving averages ... random noise is to use a moving average on ordered data by taking an average using n physical rows above and below each row. A moving average will operate in a window so that if the moving average is based ... 70.18 08-FEB-06 70.18 69.712 68.76 70.18 09-FEB-06 70.18 69.950 69.55 70.18 Displaying a Running Total UsingDisplaying a Running Total Using SUM as an Analytical FunctionSUM as an Analytical Function As we...
Ngày tải lên: 08/08/2014, 18:21
Using information technology in teaching and learning reading skill of english for biology for 2nd-year students
... and (3) advantages of using computers in reading ESP teaching and learning. I.2.3.1.1.Model of teaching ESP reading with computers Some models of using computers in teaching FL can be applied ... teaching and learning (in general) and teaching and learning FL (in particular). As far as this study is concerned, certain applications of computers in teaching and learning FL are going to ... following main methods to do the research: Consulting books, journals and newspapers on applying IT in teaching and learning foreign languages or ESP; Searching information on the Internet...
Ngày tải lên: 07/11/2012, 14:31
Production of hydrogen using composite membrane in PEM water electrolysis
Ngày tải lên: 05/09/2013, 16:11
Using Server Controls in ASP.NET AJAX
... and in a manner that involves touching your existing code as little as possible. Additionally, for new applications, it involves reusing your existing skills in ASP.NET and lowers the learning ... the query information and/or other configuration data using a graphical interface by viewing the TaskDataSet.xsd file in design mode as shown in Figure 6-13. Figure 6-13. TaskDataSet.xsd in design ... Timer1 . Delving deeper into the generated script details piece by piece would fast take us beyond the scope of this chapter. If you are interested in having a more in- depth understanding of the inner...
Ngày tải lên: 05/10/2013, 10:20
Specifying Locking Hints in a SQL Server Database
... is shown in Example 6-39 . Example 6-39. File: UsingLockingHintsForPessimisticLockingForm.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Data; ... determines correct locking; hints should be used only when necessary. Locking hints override the current transaction isolation level for the session. A locking hint is specified following the ... clause using a WITH clause. The hint is specified within parentheses and multiple hints are separated by commas. Tables Table 6-21 , Table 6-22, and Table 6-23 describe the different locking hints...
Ngày tải lên: 17/10/2013, 20:15