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Analysis of Problems easily caused by modifying function names in SQL SERVER
1. Problem
Today, I encountered a strange problem: the function definition name queried by using sp_helptext XXX is different from the function name, and sp_helptext is actually used to query the System View sys. all_ SQL _modules. Directly qu
administration system must be reproduced again. Let SQL Server Profiler capture.
3.3 Analysis and tracking
After obtaining the dead-lock phenomenon, you can see a diagram similar to the following in profiler:
The figure shows that the dead-lock events is set out in row 9th, and the specific description is displayed. Lines 13 and 14 show that one transaction
SQL Server congestion analysis (2010-08-27)Today, the staff suddenly reported that an interface could not be opened normally. The first thought was that sqlserver was blocked again.In sqlserver, a scheduled task that runs once every five minutes is performed to regularly scan for congestion. However, it has been a little too long for five minutes.Run the query bl
, when we create the index at this time left JOIN .... Is IsNull execution time is more than twice times that of not exisits. To this, about the left JOIN ... Is null and not exists to this end, I need the same next basic conclusion. Left JOIN ... Is null and not EXISTS performance Analysis conclusion: when we need to find the rows that do not match in the subquery and the column is nullable, with not EXISTS, when we need to find the rows that do not
Available for: Microsoft SQL Server? Analysis Services
Summary: Learn how to develop a scalable client and WEB application that works with Microsoft SQL Server Analysis Services by using the connection pool objects that are inclu
server|sqlserver| data
The construction and analysis of SQL Server Data Warehouse
(i) Basic concepts:
1. Cubes: Cubes are the primary object in online analytical processing (OLAP) and are a technology that allows fast access to data in a data warehouse. A cube is a collection of data, typically constr
the current key (data row)? Explain the principles of this test:1, the tests are tested at Serializable isolation levels (SET TRANSACTION isolation level serializable).2, the principle of testing is that Session1 in the use of exclusive locking lock, the use of shared lock and exclusive lock is incompatible with the characteristics of the Session2 in the use of shared locks to constantly detect the range of locks generated in the Session1.3, the test database is
information in another session (you can also use SQL Profile View Session lock information)Do not use wtih (NOLOCK)using with (NOLOCK)It can be seen from the above that the database does not generate related locks after using with (NOLOCK). By contrast, when using with (NOLOCK), the database only generates a shared lock of type DB, and a schema stability lock for the tab type.In addition, using with (NOLOCK) does not mean that it will not be blocked
process on this side has been waiting for its return results, but the linked server refers to the servers as an exception can never give this session process feedback any results, this happens, However, it is a bit odd that this situation cannot be ended by a kill session. The problem can only be resolved by restarting the server, nor by the kill process (because SQL
, and even to view the information in the System_health event session, I use File_target,ui to read and handle events without manually performing any XQuery. Observe the use of memory It is unheard of for me to be very careful about how to configure Ring_buffer targets on a production server.Two weeks ago, Andy Galbraith encountered an error with all the connections reported to the 701 system with low memory,After analysis, Andy found that in memory 1
the analysis services server on the same machine.
5. Configure analysisservice)
Add a role to the database: Set the database permission to full control, and specify the user and group for the role in the member identity: iuser.
You can use IIS to access remote analysis services.
6. Deploy WebService on IIS (Machine 2 Operations)
Refer to the URL above t
Label:Recently in the analysis of the new features of offset and fetch in SQL Server 2012, it is quite good to find that the offset and fetch, whether the syntax is concise or powerful, are fairly Which offset and fetch the most important new features are used for paging, since to analyze the paging, it must be compared with the previous pagination, especially r
Source: Microsoft SQL Server Analysis Service Data mining technologyThe latest data mining capabilities in Microsoft SSAs are required in a project, although the data mining capabilities in SSAS have never been understood in the past when projects were often used in the SSAS cube (that is, Cube). So through the project demand this Dongfeng recently learned the ne
Tags: action base row It lock represents time res this hold MYSQOriginal text: A brief analysis of the locking problem of SQL Server to prevent the range lock of Phantom read under Serializable isolation level The source of this article: http://www.cnblogs.com/wy123/p/7501261.html(It is not the original works right to retain the source, I my book still far to rea
= successful, 1-failed, 3-canceledLast_run_message: Message associated with the last_run_outcome ColumnLast_run_date: date on which the last job was runLast_run_time: the time when the last job was run.Last_run_duration: duration of last job running
5. sysjobschedules table
Information about the next execution time of a job
Schedule_id: Plan IDJob_id: Job IDNext_run_date: the next date of the job to be runNext_run_time: the time when the job is scheduled to run.
6. sysjobsteps table
Co
Tags: while empty this int release dict adding and deleting parts of the data SQL Server data full synchronization [Finalize] All rights reserved. Reprint please indicate the source. Thank you! after two days of simultaneous writing and testing. Out the first release version number: 1. This function only supports one-way synchronization. That is, from a primary database, you want multiple synchronization f
versions of the SQL2005 database have replicated the database to SQL dev through replication, export, backup, and so on, the following error occurs in the right-key table, new table, and so on:
The category does not support collections (or category objects are remote objects) (Exceptions from hresult:0x80040110 (class_e_noaggregation)) (Microsoft.SqlServer.SqlTools.VSIntegration)
Analysis: May be a bug i
If you have a shopping website, how do you recommend products to your customers? This function is available on many e-commerce websites. You can easily build similar functions through the data mining feature of SQL Server Analysis Services.
The previous article describes how to use DMX to create a mining model. This article describes how to create a mining model
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