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current database index --Very useful. SELECT object_name (OBJECT_ID) as TABLE_NAME, ( Select Name From sys.indexes where object_id = stats.object_id and index_id = stats.index_id ) as Index_name, * From Sys.dm_db_index_usage_stats as stats WHERE database_id = db_id () ORDER BY table_name --Specify the index usage of the table Declare @table as nvarchar (100) Set @table = ' T_name '; SELECT ( Select Name From sys.indexes where ob
operation of the transaction log, that is, checkpoint and lazy When writer occurs, only the dirty pages will be written to the MDF file) below to move a Song to see, slightly modified, very intuitive:Here are the main list of checkpoints and lazy writing between the differences, in fact, these differences are well known, but we still list the difference between the two for you to learn: Checkpoint and LazyWriter will be the buffer viscera pages written to disk; LazyWriter will update the buffer
1. Open the Enterprise Manager and expand the server group. 2. Click the server, right-click the server, and click the properties menu. 3. Click the memory tab in the pop-up dialog box. There are two methods to set the memory: 1. Set min
When you execute a large SQL script in Microsoft SQL Server Management Studio , there is an error that there is not enough memory to continue executing the program (mscorlib). As shownWorkaround:Using sqlcmd Import to executeFirst step: win+r type: cmd command, open command line toolStep Two: TypeSqlcmd-s link address-
1. Start or stop the SQL Agent service in Query Analyzer Start Use master Go xp_cmdshell ' net start SQLServerAgent ' Stop it Use master Go xp_cmdshell ' net stop SQLServerAgent ' Change the startup of a service from manual to automatic start exec xp_cmdshell ' scm-action 7-service mssqlserver-svcstarttype 2 ' It is also possible to execute the contents of quotes directly with the command line. 2. Cause and treatment of abnormal startup Ostensibly,
Tags: www color dex exe should see column query add Author Jonathan Allen, translator Sherry A new feature of SQL Server 2016 is the ability to add Columnstore Index (Columnstore Index) on memory-Optimized tables (Optimized table). To understand what this means, we should first interpret the term Columnstore index and memory
SQL Server Index Structure and usage (2)Author: freedk I. An in-depth understanding of the index structure Improve SQL statements Many people do not know how SQL statements are executed in SQL
, object_id, type, create_date from sys. objects Where type = 'U' Order by create_date Desc -- Query the number of cached pages in the memory SELECT count (*) AS cached_pages_count , Name, index_id FROM sys. dm_ OS _buffer_descriptors AS bd INNER JOIN ( SELECT object_name (object_id) AS name , Index_id, allocation_unit_id FROM sys. allocation_units AS au Inner join sys. partitions AS p ON au. container_id = p. hobt_id AND (au. type = 1 OR au. type = 3
OR au. type = 3) UNION ALL SELECT object_name (object_id) AS name , Index_id, allocation_unit_id FROM sys. allocation_units AS au Inner join sys. partitions AS p ON au. container_id = p. partition_id AND au. type = 2 ) AS obj ON bd. allocation_unit_id = obj. allocation_unit_id WHERE database_id = db_id () Group by name, index_id Order by cached_pages_count DESC The test results are as follows: After the table variables are created, the data page is also cached in the Buffer Pool. However, afte
,type,create_date from sys.objects Where type= ' U ' ORDER by Create_date Desc --Query in-memory cache pages SELECT Count (*) as Cached_pages_count , Name, index_id From Sys.dm_os_buffer_descriptors as BD INNER JOIN ( SELECT object_name (object_id) as name , index_id, allocation_unit_id From Sys.allocation_units as Au INNER JOIN sys.partitions as P On au.container_id = p.hobt_id and (Au.type = 1 OR au.type = 3) UNION All SELECT object_na
. We know that the relational database management system is actually set-oriented. In ms SQL SERVER, there is no way to describe a single record in a table ,, unless you use the where clause to restrict only one record to be selected. Therefore, we must use a cursor to process a single record. The cursor allows the application to perform the same or different ope
Original: Memory grant related bug caused by SQL Server Optimizer attributeWe sometimes meet some pits, either to fill it or to get around it. Here is a description of the relevant SQL Server optimizer features caused by the memory
Tags: Export database technology share nload Images Client Server man case parametersI copy the schema and data of a database into a script, and then I create a new database to execute the script, but I am prompted with the following error: Problem Description: When a client server does not allow direct backup, it is often deployed by exporting database scripts-restoring the database, However, when the da
useful statistics.* DBCC cachestatsDisplays statistics of SQL Server 2000 memory* DBCC cursorstatsDisplays SQL Server 2000 cursor statistics* DBCC memorystatsShow how SQL Server 2000
terminating the attempt and generating an error. Context Connection ' False ' True if an in-process connection should be made to SQL Server. Current Language Not available The SQL Server language record name. Data sourceOrServerOrAddressOrAddrOrNetwork Addr
Perhaps the most common mistake found in the application code is such a query request: instead of using a prepared query or program, instead of requesting data from the database using a nonparametric ad hoc query. Not preparing your query or not using stored procedures can add unnecessary SQL Server plan caching. What is a plan cache? Simply put, it is part of the SQL
Tags: des style blog http ar io color os spWe sometimes meet some pits, either to fill it or to get around it. Here is a description of the relevant SQL Server optimizer features caused by the memory grant related bugs, and related solutions, also by the way to answer the questions Jiangjian classmate.Problem descriptionA simple query consumes an incredible amoun
A connection has been established with the server, but an error occurs during logon. When you log on to sql2005 Enterprise Manager, you can use Windows for authentication. However, when you use SQL Server for authentication, that is, the SA user name is logged on, the following error message is displayed: "provider: Shared Me
TSQL statements are not available in SQL Server 2014 and are now available on 2016: Supports UNIQUE constraints and indexes Support for foreign keys between memory-optimized tables A foreign key can only refer to a primary key and cannot be created with a unique Support for CHECK constraints Non-unique indexes support
--Database memory analysis use Mastergodeclare @insSize TABLE (dbName sysname,checktime varchar, dbsize varchar (), logsize varchar ( INSERT into @insSize (DbName, Checktime, Dbsize, logsize) EXEC sp_msforeachdb ' select '? ' Dbname,convert (VARCHAR (19 ), GETDATE (), Checktime,ltrim (STR (filename,3) SQL Server database, table
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