7 handling duplicate key values
mysql cookbook 2nd edition
... Different Operating Systems Handling Duplicate Key Values Obtaining Diagnostics About Bad Input Data Skipping Datafile Lines Specifying Input Column Order Preprocessing Input Values Before Inserting ... Eliminate Duplicates Finding Values Associated with Minimum and Maximum Values Controlling String Case Sensitivity for MIN( ) and MAX( ) Dividing a Summary into Subgroups Summaries and NULL Values ... Issuing Statements and Retrieving Results Handling Special Characters and NULL Values in Statements Handling Special Characters in Identifiers Identifying NULL Values in Result Sets Techniques for...
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Saving and Restoring Data
... settings are overridable Setting these values at the DataSet level affects all tables within the data set except those that have their own distinct namespace values Setting the DataTable-level fields ... namespace and prefix values for both of the sample tables Chapter 7 Saving and Restoring Data 115 Note As mentioned in the chapter discussion, you can also define namespace and prefix values within ... code sets the namespace and prefix values for both of the sample tables Note As mentioned in the chapter discussion, you can also define namespace and prefix values within each DataColumn Although...
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Designing and Implementing Databases with Microsoft SQL Server 2000 Enterprise Edition
... distribution of the key values in the index Selectivity is a property that relates to how many rows are usually identified by a key value A unique key has high selectivity; a key value found in ... used as a DEFAULT or FOREIGN KEY constraint definition or with a NOT NULL constraint definition but it can be used as a key column in an index or as part of any PRIMARY KEY or UNIQUE constraint if ... drop the Classroom table C Remove the PRIMARY KEY constraint from the Courses table, and replace the PRIMARY KEY constraint with a composite PRIMARY KEY constraint based on the CourseID and CourseTitle...
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Tài liệu Managing and tabulating data in Excel docx
... Filling weekdays 66 4.3 Creating A New “Custom List” 67 4.4 Filling Missing Values 72 4.4.a 4.4.b Using constant increase in values 73 Using constant growth rates 74 4.5 Filling Formats 76 4.6 Copying ... all cells in a range by a number 220 Multiplying/dividing the cell values in cells in several “pasted on” columns with the values of the copied range 221 Switching Rows To Columns 221 CHAPTER ... house mortgage), discount cash flow analysis (used often for estimating the returns and present values of multi-period investment projects), and parameters associated with securities market instruments...
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Tài liệu Backups and Hidden Data doc
... file 28 Subroutine regruns() • Adds registry values to: • execute the virus at boot time • download a password grabber and set it to run at boot time Run Key determines what runs at boot time for ... illegal files The way to this on Windows systems is to hold down the shift and alt key and type in 255 on the numeric keyboard This will create a directory that is the space character, which can be ... Administration - SANS GIAC © 2000, 2001 29 regruns() run is the operative word below Sets registry keys to make the file created above, run at boot time Changes the Internet Explorer start page to...
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Tài liệu Module 7: Formatting and Transforming: XSL and XSLT pdf
... Transforming: XSL and XSLT What is the key component of support for XSLT in the NET Framework? The key component of XSLT support is the XslTransform class What is the key distinction between the XPathNavigator ... for node-sets ! A way to group together consecutive nodes that have duplicate subelements or attributes ! Features to make handling of the HTML STYLE attribute more convenient Note To see this ... Framework, the goal is to provide enormous support for XML document handling with exceptionally good performance As with other data handling products, Microsoft is committed to extremely high performance...
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Tài liệu Module 10: Backing Up and Restoring Data pdf
... overview of backing up data Prepare students for the topic by providing the following key points of information Key Points Plan backup jobs to incorporate your restore strategy Determine the backup ... Windows Backup to back up data Prepare students for the topic by providing the following key points of information Key Points To back up data using Windows Backup, specify what to back up and where ... to restore backed up data Prepare students for the topic by providing the following key points of information Key Points Use the documentation from backup jobs to perform a successful restore You...
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Tài liệu Module 4: Grouping and Summarizing Data doc
... variance of all values Statistical variance of all values VARP VARP Use aggregate functions to calculate column values and to include those values in your result set Number of values in an expression ... expression SUM SUM Total values in a numeric expression Total values in a numeric expression STDEV STDEV Statistical deviation of all values Statistical deviation of all values STDEVP STDEVP Statistical ... expression Number of values in an expression COUNT (*) COUNT (*) Lead-in Average of values in a numeric expression Average of values in a numeric expression Statistical variance of all values for the...
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Tài liệu Java and XML Data Binding Brett McLaughlin Publisher ppt
... com.sun.j2ee.blueprints.customer.account.ejb.AccountEJB Bean java.lang.String False ejb/account/AccountDAOClass ... the names or use prefixes—as you can see, there are a lot of different handling approaches You'll want to understand this handling thoroughly before using namespaces, or you may end up with results ... generated objects It also results in better XML design, as now single values are stored as XML attributes, with multiple values stored in XML elements However, you should be careful not to get...
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Tài liệu Analytical Methods: EViews and Panel Data ppt
... you type the names of all explanatory variables that you assume have different slope coefficient values for different cross-sectional units Use the format VAR? Intercept Here you specify whether ... this option you will see that the EViews output does not report standard errors, t-stats, or p -values for the estimates of the fixed effects If you are interested in these (especially for conducting...
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Tài liệu Backups and Hidden Data ppt
... file 28 Subroutine regruns() • Adds registry values to: • execute the virus at boot time • download a password grabber and set it to run at boot time Run Key determines what runs at boot time for ... illegal files The way to this on Windows systems is to hold down the shift and alt key and type in 255 on the numeric keyboard This will create a directory that is the space character, which can be ... Administration - SANS GIAC © 2000, 2001 29 regruns() run is the operative word below Sets registry keys to make the file created above, run at boot time Changes the Internet Explorer start page to...
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Tài liệu Consuming and Manipulating Data docx
... whitespace handling is to return all whitespace To experiment with the whitespace handling, change the bold line in the earlier program code to read as follows: reader.WhitespaceHandling = WhitespaceHandling.All ... Orders table) In the context of foreign keys, the table that has the primary key constraint is called the parent table, and the table that has the foreign key constraint is called the child table ... relationships The foreign key constraint can be used to restrict what actions can be performed on the two tables that are connected through this relationship of primary key and foreign key There are two...
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Tài liệu Connecting to Access and Oracle Databases docx
... OleDbDataReader object using // the Read() method myOleDbDataReader.Read(); // display the column values Console.WriteLine("myOleDbDataReader[\" CustomerID\"] = "+ myOleDbDataReader["CustomerID"]); ... OleDbDataReader object using // the Read() method myOleDbDataReader.Read(); // display the column values Console.WriteLine("myOleDbDataReader[\" empno\"] = "+ myOleDbDataReader["empno"]); Console.WriteLine("myOleDbDataReader[\"...
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Tài liệu Java and XML Data Binding ppt
... com.sun.j2ee.blueprints.customer.account.ejb.AccountEJB Bean java.lang.String False ejb/account/AccountDAOClass ... the names or use prefixes—as you can see, there are a lot of different handling approaches You'll want to understand this handling thoroughly before using namespaces, or you may end up with results ... generated objects It also results in better XML design, as now single values are stored as XML attributes, with multiple values stored in XML elements However, you should be careful not to get...
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Tài liệu Add, Edit, and Delete Data Using the DataGrid Control doc
... next step One other item to note is the RejectChanges method called in the Catch of the exception handling code This way, if an error occurs, then the change is undone, the message is noted, and ... columns of the data row, the Trim function is used Because of using the FillSchema method, the values are padded out as SQL Server columns generally are The rest of the code runs similarly to...
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