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If you have entered this post, then you must have encountered the same problem as me. Do not look at the set case of the topic when ..., I started with the first reaction is to use case when but found not to work.It's a little bit bigger than that: dynamic specifies the field to modify.In fact, little white here did not find the solution I thought [laughter cry], but at least the problem is solved.Here are the addresses of the original posts:Http://stackoverflow.com/questions/4830191/t-sql-using

--Determine if the database existsif exists (SELECT * from Master.. sysdatabases where name=n ' library name ')print 'Exist' Elseprint ' notExist' - -Determine if table exists if object_id (n ' table name ', n ' U ') is not null print "exist ' print ' not Exist ' - -to determine if a temporary table existsIf object_id (' tempdb.dbo. #临时table name ') is not Nullprint 'Exist'Elseprint ' notExist'--Determine if the stored procedure existsif exists (SELECT * from dbo.sysobjects WHERE id =

MySQL-5.6.xx-winx64 installation-Free Edition configuration method, MySQL-5.6.xx-winx64 installation-free configuration method1. Download Mysql-5.6.xx-winx64 from the mysql official website.2. decompress the MySQL packageDecompress the downloaded MySQL package to a custom directory, such as: D: \ Program Files (x86) \ MySQL \ mysql-5.6.

XX for Android Design document [Android platform XX video chat/XX for Android] Date: 2010.07.20. Written by: Xu jianxiang Web: http://www.anymobile.org Modification record: 2010-07-20 Xu jianxiang Xu jianxiang Contents 1. Project Overview 1.1. Features 1.2. Development Environment 1.3. Runtime Environment 1.4. Glossary 2. System Architecture 3. Module Design

Tags: existence name nbsp Server database name authorization Username Base LocalAfter the team has completed the database migration, the project is running, and the SQL report the user specified as a definer (' XX ' @ '% ') does not exist error. Internet query After discovery is a permissions issue. The settlement bill is as follows: 1. If XX user does not exist in the database, create

DescriptionThe low IQ of Xue xx is a headache, and his teammates have suffered a terrible problem. Fortunately, Xue xx was very rich, so he bought some pills that could improve the IQ of his offspring. This medicine has three properties, a, B and P. When Xue xx uses this medicine, his genes will change, so his son's IQ will also follow the change. Suppose Xue xx'

The idea is probably the same as bzoj2395 (Portal: http://www.cnblogs.com/DUXT/p/5739864.html), or σai of each matching scheme as x,σbi as Y, and then converting each scheme to a point on a plane, Then use the KM to find the farthest point on the line.A few months ago, however, I did not know how to get the best solution for the negative right ....#define XX a traditional algorithm (for example: the minimum spanning tree, the binary graph of the optim

After Chinese urlencode, each%xx represents a byte, is that right? So the result of UrlEncode (' Medium ') is%xx%xx%xx (Utf-8 encoding) Reply content: After Chinese urlencode, each%xx represents a byte, is that right?So the result of UrlEncode (' Medium ') is%

Very bt server configuration problems. If the volume does not exist in xx.html? 404 is returned normally, but if the php extension is accessed, such? Xx. php? Return to the blank page (status code 200 )!!!!! The configuration of servers with very high wi-bt is incorrect. If the volume does not exist in xx.html? 404 is returned normally, but if the php extension is accessed, such? Xx. php? Return to the blan

After the Chinese urlencode, each % XX represents a byte, right? Therefore, the result of urlencode ( #039; #039;) is % XX (UTF-8 encoded). each % XX represents one byte, is that true? Therefore, the urlencode (in ') is % XX (UTF-8 encoding) Reply content: After the Chinese urlencode, each %

Xx-net is easy to use on Ubuntu, and if there are some reasons to use CentOS, the trouble is bigger.First need to upgrade Python version, CentOS comes with the 2.6 version is not used, must upgrade to more than 2.7, but not with Python3,yum may not rise to 2.7, so only to the official website to download the source code compiled installation. Yum itself relies on python, so it cannot unload python and can only be installed separately.1. Upgrade Python

Past Period Review:How does the XX implementation of jquery work? --1. FrameworkHow does the XX implementation of jquery work? --2.show and chained calls--------------------------SOURCE Link: enclosing instance codejquery has been used for a long time, but there are some API implementations that don't make sense. So take time to see the jquery source code, and now the learning process found some of the eggs

1. Pick up on GitHub: xx-net/xx-nethttps://github.com/(search site)2. Click on the Chinese document2.1 I chose to use the Chrome browser settings xx-net (graphic detailed version)3. Open Google Chrome to choose an extension program3.1 Click the extension program3.2 Drag-and-drop files switchyomega.crx to this page3.33.4 Select Restore from backup file and select

; - } - } + } - +JQuery.prototype.init.prototype = Jquery.prototype;Why use JQuery.prototype.init to instantiate an object instead of using the jquery function directly? Suppose you use JQuery functions to instantiate objects, so that references between objects can be simplified to jquery-->jquery.prototype.But the call becomes cumbersome: new $ (' div '), so based on this consideration (guessing (⊙0⊙)), the more complex implementation is used internally to simplify the call.-------

This article mainly introduces the Python JSON error XX is not JSON serializable solution of the relevant information, the need for friends can refer to the following Python JSON error XX is not json serializable workaround When using JSON, you often encounter xxx is not JSON serializable, which means that some objects cannot be serialized. Often, Django's classmates know that Django has a self-contained e

This article describes how php converts the date format to the format xx days ago. it involves php time operations and regular expression matching techniques and is very useful, for more information about how php converts the date format to the format xx days ago, see the following example. Share it with you for your reference. The details are as follows: This code format the time in the format of 3 days a

First, when setting the session pageSession_Start ();Session ("name", $adminname);Join Session time ()Session ("Time", Time ());Re-entryAnti-Illegal login controllerClass Commoncontroller extends Controller{Public Function __construct (){Parent::__construct ();if (Empty ($_session[' name ')){$this->error ("Not logged in, please log in first.", "xxxxx");}Add the following time verificationAdd the following timeOld Time$old =$_session[' time ';New Time$new =time ();The difference between them is s

When the framework is integrated, most of the XML configuration files are copied from the other framework. Today in the practice of integration at the time before the project is clear, but copied to the project after the error. Error code: Critical: ExWhen the framework is integrated, most of the XML configuration files are copied from the other framework.Today in the practice of integration at the time before the project is clear, but copied to the project after the error.Error code:A processin

During file upload, $ _ FILES [ # x27; XX # x27;] [ # x27; tmp_name # x27;] solve the temporary file validity period ??? To do a business, you need to extract data from the excel file uploaded by the user, but you do not need to save the excel file. I read data by uploading a temporary file $ _ FILES [excel] [tmp_name. But will this temporary file be automatically cleared? If it is automatically cleared, when the temporary file is uploaded, $ _ FILE

In the afternoon, I re-organized a piece of code and encountered a problem: either memory access conflict or "stack around the variable XX was too upted" error.Very annoying!The first error is "stack around the variable XX was too upted, the first solution found on the Internet is to set the basic runtime check to the default value in "Project-properties-configure properties-C/C ++-code generation, the orig