how to troubleshoot long running queries in sql server

--> Title: SQL Server queries available disk space of a shard. --> Author: wufeng4552 --> Date: 09:59:09 Preface If your organization has programs that require a large amount of disk space or a large proportion of a specific disk, make sure that the disk drive has sufficient storage at the beginning or key points of the program. A quick check can save a lot of ti

SQL Server queries the remote database table data to the local database, sqldbStep 1: Sp_configure 'show advanced options', 1; RECONFIGURE; sp_configure 'ad Hoc Distributed Queries ', 1; RECONFIGURE; GO Step 2: Insert into table_namecolumnsSELECT columns from openrowset ('sqlcl', '

Original: SQL Server blocking queryIn the production environment, sometimes the company customer service reflects the Web page half a day, in addition to the browser according to F12 network response to troubleshoot, to determine the Web server after the failure. You need to check if the database is blockedAt that time

Article from: Baidu know/** Query whether all data in a database contains the specified string*/Declare @str varchar( -)Set @str='Dynamic Soft' --the string to search forDeclare @s varchar(8000)DeclareTbcursorLocal forSelectS='if exists (select 1 from ['+B.name+'] where convert (varchar,['+A.name+']) like"'%'+@str+'%"') Print"'Select Top 5 ['+A.name+'],* from ['+B.name+']" " fromSyscolumns AJoinSysobjects b ona.ID=b.idwhereB.xtype='U' andA.status>=0--field type of the column being looked up an

Tags: SELECT * from Information_schema.columns WHERE table_name= ' account ' SELECT [case] A.colorder=1 then d.name Else ' ' End ' as table name,--if the table name is the same, return the empty a.colorder as field ordinal, a.name as field name, (case when ColumnProperty (A.id,a.name, ' Isidentity ') =1 then ' √ ' else ' end as identifier (case when (SELECT count (*) from sysobjects--query primary key Where (the name in (the SELECT name from sysindexes WHERE (id = a).

Query all data with user number 1165:Select * from where inch (7,1,2, Yonghuid = '1165'orderbydescQuery for data with user number 1165 and monitoring parameter (1,2,7,15,19,20): Select * fromT_JIANKANGJC_JIANCESJ Awhere exists( Select * from ( SelectJiancecsid,Max(JIANCESJ) asFtime fromT_jiankangjc_jiancesjwhereYonghuid='1165' andJiancecsidinch( +,7,1,2, -, the)Group byjiancecsid) x whereX.jiancecsid=A.jiancecsid andA.jiancesj=X.ftime)SQL

1. Query which stored procedures (hereinafter referred to as SP) are used by a table to:SELECT DISTINCT object_name (ID) from syscomments where ID in(select id from sysobjects where type = ' P ') and the text like '%tablename% '2. Find those procedures to update the table:SELECT DISTINCT object_name (ID) from syscomments where ID in(select id from sysobjects where type = ' P ') and the text like '%update tablename% 'SQL

Tags: Copyright notice: This article blog original articles, blogs, without consent, may not be reproduced. MyBatis-like fuzzy queries in Oracle, MySQL, DB2, SQL Server

displayed at a timeExample: Find out the displacement of the car between 400,000 to 500,000ORDER BY clause: ORDER BY column nameNOTE: ASC arranges desc in descending order by ascendingExample 1: Sort by car price in ascending orderExample 2: According to the car's fuel consumption in descending order, the same as fuel consumption, by car price descending orderNote: If a table has the price of the fruit and the inventory of the two columns, but there is no cost this column, to calculate the cost

The most obvious feature of SQL differs from other programming languages is the order in which the code is processed. In a large number programming language, code is processed in encoded order, but in the SQL language, the first processed clause is the FROM clause, although the SELECT statement first appears, but is almost always finally processed.Each step produces a virtual table that is used as input to

StatementSELECT * from database a.dbo. Table A, database b.dbo. Table b b WHERE A.field=b.field"DBO" can be omitted asSELECT * from Database A. Table A, database B.. Table b b WHERE A.field=b.fieldSQL Server database:--This is an IP or hostname that maps a remote database exec sp_addlinkedserver ' remote database ', N ' SQL Servers '--this is logged in to the remote database exec sp_ Addlinkedsrvlogin ' rem

: Server.Database.Schema.Table in the current database does not require the server and database name, that is, in general we need some of the latter two parts. There are two advantages to using qualified names, ① avoid accidental errors, ② improve the performance of queries, so it is recommended to develop good habits. Where Condition Filters the output from the FROM clause and restricts the rows returned

intif (@sys_Begin Set @sys_Begin =0ElseSet @[email protected]_begin-1IF ISNULL (@sys_Where, ") ="SET @new_where1 = ' 'ELSESET @new_where1 = ' WHERE ' + @sys_WhereIF ISNULL (@sys_Order, ') BEGINSET @new_order1 = ' ORDER by ' + Replace (@sys_Order, ' desc ', ')SET @new_order1 = Replace (@new_order1, ' ASC ', ' desc ')SET @new_order2 = ' ORDER by ' + @sys_OrderENDELSEBEGINSET @new_order1 = ' ORDER by ID DESC 'SET @new_order2 = ' ORDER by ID ASC 'ENDSET @SqlCount = ' SELECT @RCount =count (1), @PCo

"Guide" This article describes several different strategies for creating molecular queries from atoms in SQL Server. Each SQL Server developer has its own preferred method of action. My method is called molecular inquiry. These are quer