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Articles by Wendelius (Articles: 29, Technical Blogs: 2, Tip/Tricks: 37, Reference: 1)

Articles: 29, Technical Blogs: 2, Tip/Tricks: 37, Reference: 1

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Average article rating: 4.89

Database Development
SQL Server
Posted: 2 Dec 2008   Updated: 2 Dec 2008   Views: 125,046   Rating: 4.92/5    Votes: 31   Popularity: 7.11
Licence: The Code Project Open License (CPOL)      Bookmarked: 89   Downloaded: 1,138
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How to pass multiple records to a Stored Procedure in a single roundtrip.
Posted: 20 Feb 2011   Updated: 25 Feb 2011   Views: 79,726   Rating: 4.85/5    Votes: 18   Popularity: 6.08
Licence: The Code Project Open License (CPOL)      Bookmarked: 32   Downloaded: 222
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This article describes the pseudo column to identify the unique physical location of a single row.
Posted: 17 Mar 2011   Updated: 26 Mar 2011   Views: 74,203   Rating: 4.95/5    Votes: 24   Popularity: 6.84
Licence: The Code Project Open License (CPOL)      Bookmarked: 41   Downloaded: 546
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SQL Server not having the aggregates you need? Why not build your own.
Posted: 10 Mar 2011   Updated: 6 Aug 2011   Views: 558,093   Rating: 4.92/5    Votes: 51   Popularity: 8.27
Licence: The Code Project Open License (CPOL)      Bookmarked: 65   Downloaded: 1,207
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This article shows few examples for using Table-Valued Functions.
Posted: 19 Sep 2011   Updated: 20 Sep 2011   Views: 30,422   Rating: 0.00/5    Votes: 0   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 88
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This article describes how to mimic the null-safe equal to operator using an UDF in SQL Server.
Posted: 27 Dec 2011   Updated: 27 Dec 2011   Views: 250,934   Rating: 4.91/5    Votes: 16   Popularity: 5.78
Licence: The Code Project Open License (CPOL)      Bookmarked: 26   Downloaded: 1,310
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This article describes a few techniques for how multiple SQL statements can be executed with one SqlCommand.
Posted: 20 May 2012   Updated: 20 May 2012   Views: 16,870   Rating: 4.90/5    Votes: 7   Popularity: 4.14
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 113
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This article describes a mechanism how trigger actions bypassed based on database user information
Posted: 7 May 2012   Updated: 9 Aug 2012   Views: 68,491   Rating: 4.55/5    Votes: 8   Popularity: 4.11
Licence: The Code Project Open License (CPOL)      Bookmarked: 25   Downloaded: 0
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Article describes basic information about transaction log behavior and truncation of the log.
Posted: 15 Dec 2011   Updated: 12 Dec 2014   Views: 379,115   Rating: 4.90/5    Votes: 40   Popularity: 7.86
Licence: The Code Project Open License (CPOL)      Bookmarked: 50   Downloaded: 977
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Some simple scenarios to calculate running totals in SQL Server.
Posted: 19 Jan 2015   Updated: 21 Feb 2015   Views: 41,080   Rating: 4.94/5    Votes: 30   Popularity: 7.23
Licence: The Code Project Open License (CPOL)      Bookmarked: 38   Downloaded: 246
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How to log information into a table from inside a transaction, even if the transaction is rolled back.
Posted: 11 Feb 2011   Updated: 12 Jul 2016   Views: 44,762   Rating: 4.97/5    Votes: 17   Popularity: 6.11
Licence: The Code Project Open License (CPOL)      Bookmarked: 16   Downloaded: 58
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When considering to use NOLOCK hint, there are a few things that should be kept in mind.
Posted: 13 Oct 2016   Updated: 18 Oct 2016   Views: 13,633   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 12   Downloaded: 369
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Discussion and a few approaches how to restrict logging into SQL Server using a logon trigger or into a database by using a specific procedure.
Posted: 2 Oct 2016   Updated: 4 Nov 2016   Views: 17,702   Rating: 5.00/5    Votes: 9   Popularity: 4.77
Licence: The Code Project Open License (CPOL)      Bookmarked: 19   Downloaded: 495
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Few CLR procedure concepts to write into a file from SQL Server database
Posted: 3 Jan 2009   Updated: 11 Dec 2016   Views: 198,007   Rating: 4.87/5    Votes: 44   Popularity: 7.95
Licence: The Code Project Open License (CPOL)      Bookmarked: 91   Downloaded: 4,987
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Desribes how to store and fetch binary data to a filestream column compared to a varbinary column.
Posted: 2 Apr 2017   Updated: 2 Apr 2017   Views: 7,561   Rating: 4.95/5    Votes: 4   Popularity: 2.98
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 85
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This is an alternative for "What You See Is What You Update"
Posted: 23 Mar 2017   Updated: 30 Apr 2017   Views: 18,041   Rating: 4.91/5    Votes: 15   Popularity: 5.62
Licence: The Code Project Open License (CPOL)      Bookmarked: 15   Downloaded: 501
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This article explains the problem, when another transaction (concurrent or not) accidentally overwrites previously modified data and how to prevent this from happening.
Posted: 19 Aug 2015   Updated: 10 Jul 2017   Views: 40,627   Rating: 4.91/5    Votes: 40   Popularity: 7.70
Licence: The Code Project Open License (CPOL)      Bookmarked: 59   Downloaded: 826
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This article discusses some basic requirements for successful database operations such as error handling, use of parameters and transactions.
Posted: 11 Oct 2008   Updated: 7 Feb 2018   Views: 60,953   Rating: 4.34/5    Votes: 23   Popularity: 5.91
Licence: The Code Project Open License (CPOL)      Bookmarked: 35   Downloaded: 196
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This article describes how to enable SQL Server internal row versioning to achieve greater concurrency in OLTP systems. This is done by enabling snapshot isolation.
Posted: 26 Dec 2018   Updated: 26 Dec 2018   Views: 4,982   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 100
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This article shows a custom SQL Server function to split a string delimited by a character or a set of characters. The function also contains a few handy enhancements.
Desktop Programming
ATL
Posted: 13 Sep 2012   Updated: 13 Sep 2012   Views: 59,908   Rating: 5.00/5    Votes: 9   Popularity: 4.77
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 0
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This is an alternative for "SQL Server: Query to find upcoming birthdays for the current week"
WPF
Posted: 10 Feb 2015   Updated: 17 Feb 2015   Views: 51,363   Rating: 4.92/5    Votes: 47   Popularity: 8.13
Licence: The Code Project Open License (CPOL)      Bookmarked: 92   Downloaded: 3,122
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This article shows how to build a responsive directory size browser application utilizing threading. The source code includes both C# and VB.Net
Programming Languages
F#
Posted: 22 May 2016   Updated: 15 Aug 2017   Views: 42,399   Rating: 4.97/5    Votes: 14   Popularity: 5.53
Licence: The Code Project Open License (CPOL)      Bookmarked: 31   Downloaded: 1,686
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Simple linear trend calculation with different types for X values implemented in C#, VB, and F#
SQL
Posted: 19 Mar 2011   Updated: 19 Mar 2011   Views: 32,823   Rating: 4.91/5    Votes: 8   Popularity: 4.43
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 146
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How to create custom aggregates in Oracle using PL/SQL
Posted: 14 Sep 2011   Updated: 14 Sep 2011   Views: 181,639   Rating: 4.72/5    Votes: 11   Popularity: 4.92
Licence: The Code Project Open License (CPOL)      Bookmarked: 23   Downloaded: 0
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This article briefly describes basic information about installing the Oracle 11g XE database on Windows and few Developer tools such as SQL Developer
Posted: 8 Jan 2012   Updated: 8 Jan 2012   Views: 42,762   Rating: 4.94/5    Votes: 5   Popularity: 3.45
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 309
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This article describes how to use a sequence to mimic the SQL Server identity column in Oracle.
Posted: 13 Mar 2011   Updated: 1 Apr 2012   Views: 157,424   Rating: 4.75/5    Votes: 11   Popularity: 4.75
Licence: The Code Project Open License (CPOL)      Bookmarked: 13   Downloaded: 994
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The article starts with building a simple toolkit package using basic PL/SQL but also covers some more advanced techniques, such as pipeline.
Posted: 30 Apr 2012   Updated: 30 Apr 2012   Views: 31,737   Rating: 5.00/5    Votes: 5   Popularity: 3.49
Licence: The Code Project Open License (CPOL)      Bookmarked: 8   Downloaded: 265
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This article describes techniques such as autonomous transactions and action information that can be used when logging information about operations in Oracle database.
Visual Basic
Posted: 22 Apr 2012   Updated: 5 May 2012   Views: 261,774   Rating: 4.93/5    Votes: 48   Popularity: 8.24
Licence: The Code Project Open License (CPOL)      Bookmarked: 109   Downloaded: 19,737
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This article describes how to create a basic Excel workbook using Open XML.
Posted: 9 Sep 2012   Updated: 21 Aug 2015   Views: 101,107   Rating: 4.98/5    Votes: 49   Popularity: 8.37
Licence: The Code Project Open License (CPOL)      Bookmarked: 127   Downloaded: 4,698
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Article describes how to encrypt a dataset using AES. Optionally the dataset is compressed before the encryption.

Average blogs rating: 4.72

Database Development
SQL Server
Posted: 7 Oct 2012   Updated: 19 Oct 2012   Views: 13,100   Rating: 0.00/5    Votes: 0   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 0
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System.IO.Packaging namespace in WindowsBase may cause problems when trying to create a CLR procedure.
Programming Languages
SQL
Posted: 23 Aug 2015   Updated: 25 Aug 2015   Views: 15,980   Rating: 4.72/5    Votes: 6   Popularity: 3.68
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 0
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This post discusses about how to add checks into a SQL statement in order to prevent wrong results in case of possible future changes.

Average tips rating: 4.87

Database Development
SQL Server
Posted: 20 Feb 2011   Updated: 20 Feb 2011   Views: 98,617   Rating: 4.95/5    Votes: 12   Popularity: 5.34
Licence: The Code Project Open License (CPOL)      Bookmarked: 22   Downloaded: 0
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This tip describes how to delete duplicate rows from a table that doesn't have a key.
Posted: 5 May 2012   Updated: 6 May 2012   Views: 22,631   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
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This is an alternative for "List SQL Server table column name as rows".
Posted: 14 May 2012   Updated: 14 May 2012   Views: 8,350   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 32
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This is an alternative for "Applying Running Total to a Result set"
Posted: 19 May 2012   Updated: 19 May 2012   Views: 6,430   Rating: 0.00/5    Votes: 0   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 24
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This tip describes how to guarantee a fixed amount of rows in a table by using triggers
Posted: 20 Feb 2011   Updated: 20 Dec 2012   Views: 30,320   Rating: 5.00/5    Votes: 6   Popularity: 3.89
Licence: The Code Project Open License (CPOL)      Bookmarked: 16   Downloaded: 0
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This tip describes how to delete duplicate rows from a table that doesn't have a key.
Posted: 27 Dec 2012   Updated: 17 Jan 2013   Views: 25,867   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 47
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This tip describes how to calculate an aggregate for dynamically defined columns using UNPIVOT clause.
Posted: 18 Dec 2012   Updated: 19 Jan 2013   Views: 31,533   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 38
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This tip shows how to get rows from a table where a field contains a number that is a power of 2 using LOG function.
Posted: 26 Aug 2014   Updated: 26 Aug 2014   Views: 46,597   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 190
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Generate a set of random numbers by using CTE
Posted: 26 Aug 2014   Updated: 28 Aug 2014   Views: 34,239   Rating: 4.83/5    Votes: 10   Popularity: 4.83
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 101
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Generate Fibonacci numbers using CTE
Posted: 27 Jul 2011   Updated: 31 Aug 2014   Views: 24,962   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 11   Downloaded: 70
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This tip demonstrates the use of LAG and LEAD functions in SQL Server.
Posted: 10 Sep 2014   Updated: 10 Sep 2014   Views: 7,630   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 24
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The tip shows how to intentionally cause an error in a situation where a non-existing reference would be updated.
Posted: 13 Sep 2014   Updated: 13 Sep 2014   Views: 11,072   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 58
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This tip describes how to fetch the first or the last occurrence of given day of week within a month by using a single SQL statement.
Posted: 26 Aug 2014   Updated: 16 Sep 2014   Views: 48,793   Rating: 4.64/5    Votes: 5   Popularity: 3.24
Licence: The Code Project Open License (CPOL)      Bookmarked: 10   Downloaded: 93
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How to generate desired amount of rows in SQL Server using CTE
Posted: 18 Sep 2015   Updated: 18 Sep 2015   Views: 74,682   Rating: 5.00/5    Votes: 7   Popularity: 4.23
Licence: The Code Project Open License (CPOL)      Bookmarked: 6   Downloaded: 187
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This tip shows how to calculate a difference between two datetime values and to express the difference in years, days, hours, minutes and so on.
Posted: 26 Sep 2016   Updated: 30 Sep 2016   Views: 9,160   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 0
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TrimChar function which removes occurences of the desired character from both ends of a string.
Posted: 4 Oct 2016   Updated: 4 Oct 2016   Views: 21,221   Rating: 4.50/5    Votes: 5   Popularity: 3.15
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 0
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Few tips for connecting to an SQL Server instance using DAC
Posted: 13 Oct 2016   Updated: 13 Oct 2016   Views: 11,114   Rating: 5.00/5    Votes: 8   Popularity: 4.52
Licence: The Code Project Open License (CPOL)      Bookmarked: 6   Downloaded: 36
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A little tip on how to format repeating values in SQL output using LAG function
Posted: 7 Dec 2016   Updated: 7 Dec 2016   Views: 9,420   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 2   Downloaded: 28
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This tip demonstrates how to select valid records from a table that contains validity date limits.
Posted: 28 Dec 2019   Updated: 28 Dec 2019   Views: 5,684   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 19
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How to overcome the error message "Types don't match between the anchor and the recursive part in column..." for varchar columns in a recursive CTE query
Posted: 10 Aug 2011   Updated: 10 Aug 2011   Views: 7,160   Rating: 4.60/5    Votes: 3   Popularity: 2.19
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 0
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Or simply:exec msdb..sp_help_jobsp_help_job (Transact-SQL)[^]
Desktop Programming
Windows Forms
Posted: 26 Aug 2012   Updated: 26 Aug 2012   Views: 43,243   Rating: 5.00/5    Votes: 10   Popularity: 4.77
Licence: The Code Project Open License (CPOL)      Bookmarked: 8   Downloaded: 651
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The tip shows one way to resolve if a user control is in design mode.
WPF
Posted: 5 Apr 2021   Updated: 5 Apr 2021   Views: 3,072   Rating: 4.53/5    Votes: 6   Popularity: 3.52
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 52
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When a string longer that 65536 is shown using a message box, the result might be unexpected.
Oracle
Posted: 21 Feb 2011   Updated: 26 Jul 2015   Views: 17,140   Rating: 4.86/5    Votes: 4   Popularity: 2.92
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
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This alternative is created to correct few mistakes in the original tip. Most importantly: Never update system tables.
Programming Languages
C#
Posted: 29 Feb 2020   Updated: 29 Feb 2020   Views: 11,680   Rating: 5.00/5    Votes: 4   Popularity: 3.01
Licence: The Code Project Open License (CPOL)      Bookmarked: 0   Downloaded: 47
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Toggle mouse button swapping between on and off
Posted: 17 Nov 2012   Updated: 17 Nov 2012   Views: 8,200   Rating: 0.00/5    Votes: 0   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 7   Downloaded: 51
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The tip shows an example for using multiple partial classes to define a single class.
Posted: 26 Jul 2012   Updated: 26 Jul 2012   Views: 22,121   Rating: 4.72/5    Votes: 4   Popularity: 2.84
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 94
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This tip describes few examples how ro cumulate values using an extension method with LINQ
Posted: 20 Jul 2012   Updated: 10 Aug 2012   Views: 53,416   Rating: 4.64/5    Votes: 10   Popularity: 4.64
Licence: The Code Project Open License (CPOL)      Bookmarked: 16   Downloaded: 109
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This tip describes how to use an existing enum to define a new, for example a context specific enum.
Posted: 26 Jul 2015   Updated: 26 Jul 2015   Views: 7,051   Rating: 4.50/5    Votes: 2   Popularity: 1.35
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 141
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This tip shows how to extract images from an Office document saved in Office Open XML format.
Posted: 7 Nov 2012   Updated: 7 Nov 2012   Views: 24,113   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
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This is an alternative for "Manipulating a string array using a Lambda Expression"
Posted: 27 Mar 2012   Updated: 27 Mar 2012   Views: 17,261   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 0
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This tip describes a way to get publishing information for a ClickOnce deployed application
SQL
Posted: 19 May 2012   Updated: 19 May 2012   Views: 10,030   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 22
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This tip describes how to guarantee a fixed amount of rows in a table by using triggers in Oracle.
Posted: 31 Aug 2014   Updated: 31 Aug 2014   Views: 13,092   Rating: 5.00/5    Votes: 1   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 34
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Two ways of generating desired amount of rows in Oracle by using a single SQL statement.
Posted: 5 Sep 2014   Updated: 5 Sep 2014   Views: 21,413   Rating: 4.20/5    Votes: 2   Popularity: 1.26
Licence: The Code Project Open License (CPOL)      Bookmarked: 5   Downloaded: 55
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This tip shows two ways of generating Fibonacci numbers in a single SQL statement
Posted: 22 Feb 2011   Updated: 26 Jul 2015   Views: 22,360   Rating: 4.82/5    Votes: 6   Popularity: 3.75
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 0
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This tip demonstrates the use of LAG and LEAD functions in Oracle.
Posted: 13 Jul 2017   Updated: 13 Jul 2017   Views: 162,863   Rating: 5.00/5    Votes: 3   Popularity: 2.39
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 48
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This is an alternative for "What’s the Difference between a Full Index Scan and a Fast Full Index Scan in Oracle?"
Visual Basic
Posted: 28 Jul 2012   Updated: 27 Jul 2012   Views: 9,880   Rating: 0.00/5    Votes: 0   Popularity: 0.00
Licence: The Code Project Open License (CPOL)      Bookmarked: 1   Downloaded: 19
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This is an alternative for "Cumulating values with LINQ"
Posted: 5 Oct 2015   Updated: 5 Oct 2015   Views: 17,362   Rating: 4.93/5    Votes: 11   Popularity: 5.13
Licence: The Code Project Open License (CPOL)      Bookmarked: 19   Downloaded: 517
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This tip shows one way to query hierarchical data from a DataTable by using an AsTree() method.
Posted: 25 Nov 2011   Updated: 24 Dec 2011   Views: 20,530   Rating: 4.73/5    Votes: 6   Popularity: 3.68
Licence: The Code Project Open License (CPOL)      Bookmarked: 3   Downloaded: 0
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As a general rule of thumb, I'd suggest browsing http://www.connectionstrings.com/[^] for connection strings against popular data sources.
Posted: 1 Apr 2012   Updated: 1 Apr 2012   Views: 14,150   Rating: 5.00/5    Votes: 2   Popularity: 1.51
Licence: The Code Project Open License (CPOL)      Bookmarked: 4   Downloaded: 0
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This is an alternative for "Getting publishing information for a ClickOnce deployment"

Average reference rating: 4.92

Posted: 5 Nov 2013   Updated: 4 Aug 2017   Views: 175,851   Rating: 4.92/5    Votes: 50   Popularity: 8.27
Licence: The Code Project Open License (CPOL)      Bookmarked: 212   Downloaded: 0
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Wendelius
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Europe Europe
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