sql server query optimizer tool

AD HOC Paging: It means to request a separate page with the number of pages and the size of the page. Here is an example. DECLARE @pagesize as int, @pagenum as int; SET @pagesize = 5; SET @pagenum = 2; With Salescte as ( SELECT row_number ()-qty, Empid) as RowNum, empid, Mgrid, qty from dbo. Sales ) SELECT rownum, Empid, Mgrid, qty from salescte WHERE rownum > @pagesize * (@pagenum-1) and rownum Description: In the last example, in fact,

Label:Objective:　 This article as long as the record, the process of the birth of the tool, the role of the technology is too simple to say that there is no technology ~ mainly exercise the ability to write articles! Body: In the development of projects, often to maintain or change some of the old projects, involving a few simple table operations, most of them are ADO operation database Code! Write changes, additions, deletions, etc. With those code g

Original: Set STATISTICS io and set STATISTICS time in SQL Server query performance optimizationIn recent times, has been exploring the SQL Server query performance issues, of course, also aimless search for a lot of information,

SELECT type,--clerk type sum (virtual_memory_reserved_kb) as vm_reserved_kb,--reserved Memory sum (VIRTUAL_MEMORY_COMMITTED_KB) as VM_COMMITTED_KB,--committed memory sum (awe_allocated_kb) as awe_allocated_kb,--the memory sum (shared_memory_reserved_kb) as SM used when opening awe _RESERVED_KB,--shared reserved memory sum (shared_memory_committed_kb) as sm_committed_kb,--shared commit memory sum (single_pages_kb) as SINLGEPAGE_KB,--Buffer pool stolen Memory sum (multi_pages_kb) as multipage_kb--

In view of the serious shortage of manpower (the resources of two and a half persons were counted at that time), the idea of Manually changing databases one by one was dispelled. The current program structure does not allow revolutionary practices, but can only be improved. Therefore, we have to prepare an automated tool for processing. After the prototype was developed, it was resisted by the O m dba team during the meeting. The specific reason is u

operates as if each member server has a copy of the original table, but there is only one member table and one distributed partitioned view on each server. The location of the data is transparent to the application.11. Rebuild the index DBCC REINDEX, DBCC INDEXDEFRAG, shrink data and log DBCC SHRINKDB,DBCC shrinkfile. Sets the auto-shrink log. For large databases do not set the database autogrow, it will d

Analysis of SQL Server's focus on using indexes and query execution plans and SQL Execution plans Preface In the previous article "Analysis of the Impact of SQL Server focused indexes on non-clustered indexes", we talked about the impact of clustered indexes on non-clustered

files/Microsoft SQL Server/mssql10.mssqlserver/MSSQL/data/mydb. mdf d:/program files/Microsoft SQL Server/mssql10.mssqlserver/MSSQL/data/mydb_log.ldf (2 rows affected) */-- 3.2 mobile path use [Master] Go -- 3.2.1 disable all processes declare @ STR varchar (500); Set @ STR = ''; select @ STR = @ STR + 'Kill '+ rtrim

in the WHERE clause to join the condition, otherwise it will cause the engine to abandon the use of the index for a full table scan, such as:　Select from where num= or num= can be changed to the following query: Select from T where num= Ten UNION ALL select from T where num=5, in and not in also to use caution, otherwise it will cause a full table scan, such as:Select ID from t where num inFor consecutive values, you can use

In the process of paging data using temporary tables, it is found that the query statement conditions are passed through the stored procedure parameters. The parameter conditions cannot be directly used after the SQL where statements are added. There is only one solution to this problem, it is to concatenate SQL statements and conditions into an

% 870 (4688 lines) Stored Procedures Proc: @ProductID = 870 1305 17 928 17 Is KB 26% 870 (4688 lines) In-stored procedure declaration Proc:where P.productid [email protected] 1305 18 984 18 Is KB 24% 897 (2 lines) Instant Query where P.productid =897 20 10 792 10 Is KB 13%

SummaryThe SQL Server Desktop Engine (also called MSDE 2000) does not have its own user interface because it is primarily designed to run in the background. The user interacts with the program that is embedded through MSDE 2000. The only tool provided by MSDE 2000 is Osql. The executable file is Sql.exe in the Mssql/binn folder of the default instance of MSDE 200

References Monitoring with SQL profilerReadtrace There is a profiler tool in SQL Server to track the execution process of SQL Server and monitor all the processes of SQL

In SQL ServerEach database has a table generated by the system.The table sysobjects records all the table names in the database.We can use the following SQL syntax for query operations. Copy codeThe Code is as follows:Select Name, id from sysobjects where xtype = 'U' Xtype = 'U' indicates the table used. If xtype = 's' is used'The default table There is also a

Microsoft's SQL Server database is most commonly used in two types of files:1, the main data file, file suffix is generally. MDF;2, transaction log file, file suffix is generally. LDF.User data tables, views, stored procedures and so on data, are stored in the MDF file, the LDF file is stored in the MS SQL Server durin

row within the result set partition. The rank of a row is a number of rows before the line involved. --like here I sort by price, take out the most expensive items in each category from top to bottom SELECT * from ( SELECTI.price,i.commodityname,c.classname,rank () Over(Partition byC.classidOrder byI.priceDESC) Rank2 fromCommodityinfo iINNER JOINCommodityclass C onI.commodityclass=C.classid) RWHERERank22; Under SQL

What is osql? Osql is a Microsoft Windows 32 command prompt tool that can be used to run Transact-SQL statements and script files. Osql tool uses ODBC database applicationsProgramThe programming interface (API) communicates with the server. To put it bluntly, Microsoft's exe program can be used to connect to the local

------------------------------------------------------------------------------------------------------------------------Displays the disk activity volume generated by the transact-SQL statement.Set statistics Io on-- Disable the disk activity volume generated by the transact-SQL statement.Set statistics Io off-- Display [return detailed information about statement execution and estimate the resource require

This issue is especially important for projects with a relatively large scale. If there are hundreds of stored procedures in the database,I can't find them one by one. Even if I understand the business and system very well, it will take a long time to remember.How can I use SQL statements for queries?The following describes how to query SQL statements:Copy codeTh

SQL Server image viewing tool SQLImageViewer5.5.0.156 was held at a SQLPASS conference in Beijing on December 6, 2013, wang Zhongtao, a veteran of grui trends, introduced a database image viewing tool. I don't know if you are impressed. However, the plug-in introduced in this article is not a