how to troubleshoot long running queries in sql server

If you want to use OpenRowSet to query a remote database, the SQL Server prompts that the access error to the component \ 'ad hoc distributed queries \ 'is blocked. Search for the error on the Internet and find the solution: Enable ad hoc distributed queries:Exec sp_configure 'show advanced options', 1ReconfigureExec sp_configure 'ad hoc distributed

Label:One: When paging a query, SQL Server uses the top keyword, and MySQL uses the limit e.g: Search for fifth to tenth entry-level staff SQL server2000: Select Top 6 * from EMP where empno not in (select Top 4 empno from emp Order by HireDate) order by HireDate; Mysql: SELECT * from emp order BY hire date limit 4, 6; P.s:limit a means the previous a record Lim

orParentID="') -->end Union All -->begin a recursive member SelectTB_ZYM_ZTBM. ztbm_id, TB_ZYM_ZTBM.ZTBM_NAME,TB_ZYM_ZTBM. ParentID,cast(Replicate(' 　　 ', Levle+1)+'|_'+Tb_zym_ztbm.ztbm_name as nvarchar(MAX)) asTE, CTE. OrderID* -+Row_number () Over(Order by GETDATE()) asOrderID, Levle+1 asLevle fromTb_zym_ztbmInner JoinCTE onTB_ZYM_ZTBM. ParentID=CTE. ztbm_id-->end ) Select * fromCTEOrder by LTRIM(OrderID) Reference: http://blog.csdn.net/bin_520_yan/article/details/5998349 htt

Tags: Way SQL Server December from Ted colleague tween useToday, a colleague found a SQL Server statement execution is particularly slow, after the inspection found that the condition plus the time period, before using the time field between XXX and xxx way, then change the time to determine the method,----------Dafedi

Label:Recently while working with data migration,got an error while running a following query where Server2 have beed added as Li nked server. Select * from Server1.Database1.dbo.Table1 WHERE Column1 not in (select Column1 from Server2.Database2.dbo.Table1) GO -Error raised while run above query "XML data type was not supported in Dist ributed queries. Remote object ' Server2.Database2.dbo.Table1 ' has

,c.questionnairetitle fromnotices a Left JoinAwardorders b onA.awardorderid=b.ID andB.status=1 Left JoinQuestionnairesinfor C onA.questionnaireid=C.id andC.status=1 Left Join(SelectNoticeid,COUNT(1) asSumcount,noread=sum( Case [Status] when 1 Then 1 Else 0 End),Alread= sum( Case [Status] when 2 Then 1 Else 0 End) fromUsernoticesGroup byNoticeid) E onA.noticesid=E.noticeidwhereA.status=1 The notification is sent to the user notification table according to the ID string of the comma-se

Label:The LIKE operator is used for pattern-matching queries when a query is encountered that does not explicitly indicate a qualifying condition for the query. You can use the following wildcard characters when querying: %: Any string containing 0 or more characters -(underscore): any single character []: Make any single string in the scope ([A-f]) or collection ([abcdef]) [^]: Any single string that does not fall within the specified

Query all indicates that the select name from sysobjects where xtype= ' u ' select * from sys.tables//queries the database for all table names and row counts select A.name, B.rowsfrom syso Bjects as a INNER JOIN sysindexes as B on a.id = b.idwhere (A.type = ' u ') and [B.indid in (0, 1)] ORDER by A.name,b.rows DE sc//query all marked and space consumption \ line number Selectobject_name (ID) tablename,8*reserved/1024 Reserved,rtrim (8*dpages) + ' KB '

Data structure introduction: Student table (number, student ID, subject number, score) SQL basics: Select * from orders table For SQL Server, the query process is one by one, that is, one record; Then we can first think about it. When it queries the "orders table", the first query is successful before the second q

SQL Server queries record averages and sorted statements Query the student's average score and rank, SQL 2000 is completed with a subquery, when the average score is repeated, the position is left vacant and two kinds of positions are not retained. Select t1.*, px = (select count (1) from ( Select m.s# [student num

Tags: end track content SQL declare data time start POS/* query all Sundays @startdate start date @enddate End date in a certain date */ DECLARE @startDate datetime DECLARE @ endDate datetime DECLARE @week varchar set @startDate = ' 20150101 ' set @endDate = ' 20151231 ' while @startDate SQL Server queries all Sun

] [5] [6] [Full screen preview]? 1 2 3 SELECT TEXT FROM syscomments WHERE id=object_id(‘SP_NAME‘) SP_HELPTEXT ‘SP_NAME‘ 6.[Code]Get only user-defined stored proceduresskip to [1] [2] [3] [4] [5] [6] [Full screen preview]? 1 2 3 4 5 6 USE [your_database_name_here]; GO SELECT * FROM sys.all_objects WHERE ([type] = ‘P‘ OR [type] = ‘X‘ OR [type] = ‘PC‘) AND [is_ms_shipped] = 0 ORDER BY [name]; GO SELECT * FROM sysobjects where type=‘P‘

Business requirementsRecently made a small tool for the company to bring data from one database (data source) into another (target database). The data required to import the target database cannot be duplicated. But the situation is that the data source itself has duplicate data. So you need to clear the data source data first.So we summarize the query and processing of the duplicate data. This is only a database-based solution. The implementation of the program is not considered.Environment is:

SQL Server tables: SELECT COUNT (1) from sysobjects where xtype= ' U ' views: select COUNT (1) from sysobjects where xtype= ' V ' number stored procedures Selec T count (1) from sysobjects where xtype= ' P 'SELECT * from sysobjects WHERE (xtype = ' U ')C = CHECK ConstraintD = defaults or DEFAULT constraintsF = FOREIGN KEY constraintL = LogFN = Scalar functionIF = Inline Table functionP = Stored ProcedurePK

Tags: style blog http color ar os SP data divOriginal: SQL Server group Query the time difference between two adjacent recordsFirst, we use two records from the table in the database to elicit problems, such asThese are the table data for a record operation record. OrderID is the self-growing column, followed by operation type, operation time, operator.The problem now is that you want to filter out all reco

Tags: SQL Server/* query all Sundays @startdate start date @enddate End date in a certain date */ DECLARE @startDate datetime DECLARE @ endDate datetime DECLARE @week varchar set @startDate = ' 20150101 ' set @endDate = ' 20151231 ' while @startDate Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.SQL Server