dynamic query in sql server

Tags: analyze one moni min sim data soft databases ImpConnection poolhttps://www.mssqltips.com/sqlservertip/5630/understanding-sql-server-connection-pooling-in-adonet/Open Activity Monitorhttps://docs.microsoft.com/en-us/sql/relational-databases/performance-monitor/ open-activity-monitor-sql-

Several problems encountered when reading Excel in the sql2005 query analyzer, collected all the resources on the Internet, and finally solved the problem. Many answers on the Internet are pasted and copied, therefore, it cannot be used in the actual environment. I believe many of my friends have encountered the same mistakes. To avoid the same mistakes, I would like to share them with you:Environment:System: windows7,Database: Sqlserver2005,Office: o

This blog briefly introduces several types of queries commonly used in SQL Server and their usage methods. 1. Obtain a single value using the ExecuteScalar Method The ExecuteScalar method is one of the SqlCommand class methods. It executes the query and returns the first column in the first row of the returned result set. Class Program {static void Main (string

Tags: style blog http color os io strong ar forfunction INVOKE-SQL1:functioninvoke-SQL {param([string]$dataSource=". \SQLExpress", [string]$database="Masterdata", [string]$sqlCommand= $(Throw "Please specify a query.") ) $connectionString="Data source= $dataSource;"+"Integrated Security=sspi;"+"Initial catalog= $database" $connection= New-object System.data.SqlClient.SQLConnection ($connectionStr

JOINDbo.sysobjects obj onCol.id=obj.id andObj.xtype= 'U' andObj.status>= 0 Left JOINDbo.syscomments Comm onCol.cdefault=comm.id Left JOINSys.extended_properties EP onCol.id=ep.major_id andCol.colid=ep.minor_id andEp.name= 'ms_description' Left JOINSys.extended_properties Eptwo onObj.id=eptwo.major_id andeptwo.minor_id= 0 andEptwo.name= 'ms_description' WHEREObj.name= 'egressi

to the table will cause the view to not be automatically added, although we can refresh the view by Sp_refreshview or sp_refreshmodule, but to avoid confusion, It is best to explicitly list the name of the required column in the view definition, and if additional columns are added and we need additional columns in the view, we can modify the view definition by Alter VIEW.View query returns extra columns resulting in inefficient

The CTE (Common Table Expressions) is a version of SQL Server 2005. The specified temporary named result set, which is called a CTE. Similar to derived tables, is not stored as an object and is valid only for the duration of the query. Unlike a derived table, a CTE can be referenced and can be referenced multiple times in the same

1. IntroductionToday at work encountered a need to do SQL Server paging data query, but the paging data query SQL has forgotten, and finally through the query data to solve the problem. Now make a note of the solution and prepare

statement operates on a datasheet, based on the data page's scanned items. The so-called data page is the underlying data storage method of the database, SQL Server stores the table row data as a data page. Each data page is 8K, 8k=8192 bytes-96 bytes (page header)-36 bytes (row offset) = 8060 bytes It's also said that a data page stores a pure data content of 8060 bytes. In turn, we explain several re

Tags: find combined with server other LTE art definition technology share defaultObjectiveIn this section we continue to talk about index knowledge, before we clustered index, nonclustered index and overlay index, there is also a filter index, through the index filter we can also improve query performance, short content, in-depth understanding.Filter indexes, create nonclustered indexes on

Use ISNULL in SQL Server to execute null value judgment query, serverisnull The following queries are available:Copy codeThe Code is as follows:Select isnull (lastchanged, '') as lastchanged from vhhostlist where s_comment = 'test202'Originally, the ISNULL function has only one parameter. It indicates that the parameter is used to determine whether the value of t

When the database is troubleshooting according to regulations, you need to view each of the 50 tables in the database to ensure that all fields that are expected to be the default value are assigned the default value. It can be imagined that this is a daunting task. Is there a better way to view this schema than opening every table in the SQL server administration suite?By querying three system tables in an

Table structureTable DataSQL as followsWith Lmenu as (select name,id,1 as lv,cast (name as nvarchar (max)) as name1, cast (Row_number () Up (order by GETDATE ()) as N varchar () as OrderID from Table2 where table2.parentid=0 Union all Select A.name, a.ID, (b.lv+1) as LV, Cast (REPLICATE (" , b.lv*2) + a.name as nvarchar (max)) as name1, cast ((b.orderid+ '. ') + CAST (Row_number () over (Order by GETDATE ()) as nvarchar (5))) as nvarchar (ten)) as OrderID from Table2 as a inner j Oin Lm