When the update value is the same as the original value, does SQL Server really go to update or ignore it?

Original: Does SQL Server really go to update or ignore when the update value is the same as the original value?Consider the following scenario:When the update value is the same as the original value, does SQL Server really go to update or ignore it?

SQL Server collation and ETL does not support sqlserverdatetime2 issues

The collation of SQL Server is roughly divided into Windows collation and SQL Servers collation. When the data is installed, defaults to Sql_latin1_general_cp1_ci_ai are not set by default. When the database is created, if you do not set a collation

SQL Server 2014 Log Shipping Deployment (6): monitoring log shipping

13.3 Monitoring Log shippingAfter you deploy log shipping, you need to monitor information about the status of the log shipping server. The history and status of log shipping operations are always saved locally by log shipping jobs. The history and

Installation of the SQL Server Management Studio 2008 Release

After installing VS 2010, MS SQL Server 2008 is installed automatically. MS SQL Server 2008 has improved considerably over MS SQL Server 2005 and is more convenient to use. However, it was found that the SQL Server Management Studio 2005 version

Log cleanup methods under SQL Server 2008 2

Log cleanup methods under SQL Server 2008 (2011-07-14 10:30:45) Transfer from http://blog.sina.com.cn/s/blog_4bdd3d0b0100wfvq.html Tags: it Every time the database log to see the explosion of some big head, so

Row and column transpose methods in SQL Server

Pivot is used to rotate column values to column names (row to column), and SQL Server 2000 can be implemented with an aggregate function with a case statementThe general syntax for pivot is: Pivot (aggregate function (column) for column in (...)) As

Summary of SQL Server 2008 installation Failures

The first time to install SQL Server2008, encountered a lot of problems, various solutions to use, and finally installed successfully, will now experience one by one summarized as follows:Background: Microsoft Visual Studio2008 was installed on this

SQL Server 2008 Improvements to date-time types

After years of controversy, Microsoft finally cut the date-time data type, adding 4 new date-time data types in one breath in the new version of SQL Server 2008, including: Date: A pure date data type. Time: A pure temporal data type.

optimization and monitoring of SQL (SQL Server Profiler)

0. IntroductionSQL Server Supply number Daquan SQL stalking and things told to oversee the database engine in the Seizure keyword mining tool.By documenting what you specify, SQL stalking can help you deal with functional questions, review database

Application of Step6:sql Server data change timestamp (timestamp) in replication

I. What is covered in this article (Contents) What is covered in this article (Contents) Background (contexts) Scenario (solution) Scenario I (Solution one) Programme II (Solution two) Programme III (solution

SQL Server stored procedure try Catch TRANSACTION (GO)

Original: http://www.cnblogs.com/yun_shuai/archive/2010/09/20/1831546.html/*1. Minor error (Severity level 0-10): By default, the client program is not sent an error message to continue working. Which means it can't be caught in a catch.2. Medium

Get all the column information for all the tables in all of the SQL Server libraries

Recently remembered to make a project code generator that directly generates the underlying code:This is unavoidable to read the information that the database already has.Don't say much nonsense. Open the whole.SELECT from MASTER.. sysdatabases --

After you install SQL Server 2012, the Windows authentication is set to mixed-type authentication

How to resolve Sql2012windows Authentication mode to mixed authentication mode ...Because SQL Server uses Windows only authentication, users cannot connect using SQL Server's logon account, such as SA. Workaround:1. Select "Use Windows

SQL Server Bug: Extended stored procedure has been running waiting type preemptive_os_getprocaddress

Today, using Xp_readerrorlog for the first time in a new server to query a deadlock information, the results have been running, even if kill has been running:(Run in 2 server instances, one of which has been kill)exec xp_readerrorlog 0,1,null,null, '

Avoid Conflicts between access and SQL Server null values

In the Access Project (that is, the. ADP file) linked to an SQL Server database, the access function that you frequently use is usually not supported. But most of the time, you can use a Transact-SQL (T-SQL) function supported by SQL Server. One

Windows SQL Server mobile edition System Requirements

SQL Server mobile system requirements Environment Requirements Development Environment • Microsoft Visual maxcompute 2005 • One of the following operating

SQL Server uses the guid value to identify a data table row

The following articles mainly describe that the guid value is used as the row identifier in the SQL server data table. The GUID (Global unique identifier) is a globally unique identifier) it is a 16-byte binary value generated by the ID number on

SQL Server Bi step by step 3 Import batch Excel data sources to databases

Step 3 Import batch Excel data sources to databases The core of this section is to set the Foreing variables of the foreach loop container to traverse all files in the Excel directory and import the data to the target data source.Illustration: SSIS

Remote Access to SQL server, provider: named pipeline provider, error: 40-unable to open the connection to SQL Server

When the Server encounters some minor faults, it always reports that "the connection to SQL Server cannot be opened", as shown below: An error occurred while establishing a connection with the server. When you connect to SQL Server 2005, the

Example of recursive calling of stored procedures in SQL Server: SQL Server Stored Procedure

Example of recursive calling of stored procedures in SQL Server: SQL Server Stored Procedure Recursion refers to the situation where a code snippet calls itself. The danger lies in how to prevent it from repeatedly calling itself if it calls itself

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