sql server query performance analyzer

very deep, that is, more and more practical problems, have to have theoretical knowledge to support,But it is often theoretically said that the situation does not appear frequently or even if there is no attention, there is time to neglect some theoretical knowledge.For the problems encountered, if you really want to find out, still have some theoretical knowledge to do the groundwork. Many times, often after encountering problems, recalled once good seems to have seen this aspect of theoretica

name to run on any member server. The system 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.

. Switch to the second tab. The event class is listed on the left, and the existing event class is displayed on the right. For performance optimization, we do not need security review or session information. Click the delete button to continue to switch to the third tab. The data column here is enough by default. Of course, if you are not pleasing to the eye, you can delete all appname/NT username and so on. On the last tab page, we need to block the

existing event classes are displayed on the right. For performance optimization, we do not need security review or session information. Click the delete button: Switch to the third tab page, and the data column here is enough by default. Of course, if you are not pleasing to the eye, you can delete the appname/NT username and so on. On the last tab page, we need to block the event ID generated by the system: Check the excluded System ID, for examp

SQL Server Query Execution Plan AnalysisSource: http://www.sql-server-performance.com/tips/query_execution_plan_analysis_p1.aspxWhen you need to analyze the performance of a query, one of the best ways to see the execution plan fo

-- Script used to obtain the connection information of the SQL Server server (based on the original shard creation and writing) Declare@ Dbname sysname,-- The name of the database to be queried (empty for all). The connection information of all databases is queried by default.@ Brief deip bit-- Whether to display the IP address (0 NO, 1 Yes). This control is add

very deep, that is, more and more practical problems, have to have theoretical knowledge to support,But it is often theoretically said that the situation does not appear frequently or even if there is no attention, there is time to neglect some theoretical knowledge.For the problems encountered, if you really want to find out, still have some theoretical knowledge to do the groundwork. Many times, often after encountering problems, recalled once good seems to have seen this aspect of theoretica

SQL Server data insertion performance note, SQL Server Insert NOTE I haven't paid much attention to SQL Performance for a long time. Because the recent project neither has tens of milli

) Select DATEADD (Wk,datediff (Wk,0,getdate ()), 0) query yesterday Date: Select CONVERT (Char,dateadd (dd,-1,getdate)), 111 //111 is the style number, (100-114) query the first day of the month Date: Select DATEADD (mm, DATEDIFF (Mm,0,getdate ()), 0) as FirstDay query last day of the month Date: Select DATEADD (M S,-3,dateadd (mm, DATEDIFF (M,0,getdate ()) +1, 0

After sqlserver2005, MSSQL began to use the recursive query method. Compare the methods for writing stored procedures or functions at the beginning. This method is simpler and more flexible. Oracle also has its own tree structure recursive query method, connect Next I will write a piece of SQL code by myself, and briefly comment out some usage of the CTE shar

Query a stored procedure sharing of SQL Server database deadlocks. SQL Server Stored Procedure When SQL Server is used as the database application system, it cannot avoid deadlocks. Whe

V_cust_rcvlbesWHERE postcode> "98000"The number of rows in the view is less than the rows in the primary table, and the physical order is the required order, reducing disk I/O, so the query effort can be significantly reduced. 23, you can use distinct without GROUP bySELECT OrderID from Details WHERE UnitPrice > Ten GROUP by OrderIDCan be changed to:SELECT DISTINCT OrderID from Details WHERE UnitPrice > 10 24. Use UNION ALL to not use UnionUNION all

with delete can have a certain effect on the performance of the stored procedure. Because delete takes a full table-by-scan approach, it is a transactional operation that is counted into the SQL Server transaction log. Not only increases the running time, but also writes log files frequently, which causes the log file to be too large and consumes disk space exce