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Original: SQL Server Tuning Series Basics (Index operations Summary)ObjectivePrevious articles we introduced how to view the query plan, the introduction of common operators, the way of parallel operations, interested can click to view.This article will analyze in SQL Server
Label:The IO performance of SQL Server is affected by the IO latency of the physical disk and the IO operations performed internally by SQL Server. When monitoring disk performance, the primary measure (metric) is IO latency, whic
Ster model */backup DATABASE model to DISK = ' E:\SystemDatabaseBackups\Model.BAK ' with initgo/* BACKUP Master DATABASE */ Backup DATABASE Master to DISK = ' E:\SystemDatabaseBackups\Master.BAK ' with initgo/* backup Master MSDB */backup Databas E MSDB to DISK = ' E:\SystemDatabaseBackups\MSDB. BAK ' with initgo/* Copy Resource Database Files Using xp_cmdshell */EXEC xp_cmdshell ' copy/y ' D:\Program Files\Microsoft SQL
Tags: default int query full table scan condition index default policy wildcard1. Building an Index2. Avoid full table scanAvoid using is null, which is not NULL, so that writing discards the index of the field.If this is the case, try to set the default value when designing the tableCompare operators in! = Use less intLike wildcards try to put wildcards behind "qw%" and do not use fuzzy queries, which use the indexwhere L = R use less function operations, arithmetic operations, and other expres
Books Online logical operators and physical operator references Refer to the book SQL. server.2005. Technical Insider "series Conclusion This article mainly introduces some of the methods of index operation, mainly describes the way we usually apply when writing statements, and to cite a few examples, as a point, in fact, we usually write in the statement is nothing more than this article introdu
server| optimization In the actual work, especially in the production environment, the optimization of SQL statements is very important, and it also plays a significant role in improving the performance of the database. We are always complaining about the performance of the machine, always complaining about the trivia
attention, on the SQL Server performance tuning of the content is very broad, followed by the analysis in the article.If you have any questions, you can leave a message or private messages, and look forward to an in-depth study of your child's shoes with SQL
statement tuning from the execution plan, and introduces three common connection operators and aggregation operators, the next one will focus on some of our other most commonly used operators and tuning techniques, including: Curd operators, Union operators, index operations, Parallel computing and so on, the content of SQL
the T-SQL statement tuning from the execution plan, and introduces three common connection operators and aggregation operators, the next one will focus on some of our other most commonly used operators and tuning techniques, including: Curd operators, Union operators, index operations, Parallel computing and so on, the content of
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I like to think of tools bundled with SQL Server as inverted pyramid type, tools for diagnosing and checking general problems at the top, finding and diagnosing problem-specific areas of the tool at the bottom. In addition to providing a convenient way to write SQL scripts, Query Analyzer is the resource you need to use when you need to address specific
many people who understand database products are familiar with it, but the way in which some statements in SQL Server take advantage of the index may not be clear, our next analysis of this piece, to understand the indexing method and optimization techniques, interested in advance attention, about SQL Server
Tags: time interval fetch number release operation rebuild file GIF world loadThe IO performance of SQL Server is affected by the IO latency of the physical disk and the IO operations performed internally by SQL Server. When monitoring disk
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Label:Problems encountered in a project: The system log is too large, and later deleted with the DELETE statement (rather slow), the results of the database log becomes very large (almost 10G), so you have to delete the database log.Method:--partial logs in the backup system--select * into #keep from Ccssystemlog WHERE logtime > ' 2011-12-31 '--truncate TABLE Ccssystemlog--insert ccssystemlog SELECT * from #keep--drop Table #keep--Clear the database log (you can also use the database detach--del
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Original http://www.cnblogs.com/BoyceYang/archive/2013/06/15/3138142.html Read navigation 1. Overview 2.RulesLogic Database Design 3.EnableDesign with efficient Indexes 4.EnableEfficient Query Design 5.EnableLow performance analysis with technology 6. Summary 1. Overview This is the most effective way to optimize SQL server
Label:SELECT Mig.index_group_handle, Mid.index_handle, CONVERT (Decimal (28,1), Migs.avg_total_user_cost * Migs.avg_user_impact * (Migs.user_seeks + Migs.user_scans) ) as Improvement_measure, ' CREATE index idx_ ' + object_name (object_id,database_id) + ' _missing_ ' + Replace (replace (replace (ISNULL (Mid.equality_columns, ') + ' _ ' + ISNULL (Mid.inequality_columns, '), ', ', ' _ '), ', '), ' [', ' '), '] ', ') + ' On [' + object_name (object_id,database_id) + '] (' + ISNULL (mid.equality_col
)) FROM Seq WHERE id Then we execute this stored procedure and insert the test data. SQL Server Management Studio records the operation time in the lower right corner of the output window. To be more intuitive, we manually wrote a statement that records the time, as shown below: DECLARE @ d datetimeSET @ d = getdate () print 'start to execute the stored procedure... 'exec pro_Count_Test; S
Tags: file http img Local image HTTPS student engine MSSThe recent project to do thousands of students to face recognition record (currently about 630000 lines) query the last record, it is conceivable that the performance of this piece is a problem. As a shen, get to SQL Server Profiler and Database Engine Tuning Advi
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