SQL Server

I've been doing a project recently, there are a lot of test data in the database, and then deleted with the delete * statement, but found that since the growth of the column (generally the primary key) cardinality and did not return to zero, after

Suitable for sqlserver2005 and above, not fit to 2000 First find SQL Server Management Studio in the Start menu and start it, and connect with Windows authentication, as shown in the following figure: Figure 1 Figure II

To maximize the performance of SQL Server, you must first identify several aspects. When these several aspects are optimized, the whole system performance can be improved to the greatest extent. You can then analyze these several aspects. Otherwise,

Add the following sentence to the ADO connection SQL server//header file. #import "C:\Windows\system\msado15.dll" no_namespace rename ("EOF", "rseof")//cpp inside CoInitialize (NULL), _connectionptr pconn (__uuidof (Connection)); _RecordsetPtr pRst (

1 in the process of using the database will increase the log files, so that the performance of the database decreased, and occupy a large amount of disk space. The SQL Server database has a log file, and the log file records the user's actions on

Types of I/O operations in SQL Server:1. For data that is not cached in memory, the first time you access it, you need to read the data from the data file into memory from the page where you are2. Before any insert/update/delete is committed, SQL

DECLARE @object intDECLARE @hr intDECLARE @src varchar (255), @desc varchar (255)Declare @tmp intDECLARE @msg varchar (3000) -------------------------1. Write the file----------------------------------------write this string of characters into the

First insert a few data in my student table, because my table has been created, so there is no SQL statement to create the table, but you can see my previous article:Http://www.cnblogs.com/Brambling/p/6649350.htmlInsert Data SQL statement:1 　

Straight to the subject, record namespaces: Using System.Data.SqlClient; Database link string: SQL Server database link string format: server={0};d atabase={1};uid={2};p wd={3}//0: Server, 1: Database name, 2: User name, 3: password Call:

FOR XML PATH Some people may know that some people may not know, in fact, it is the query result set is presented in XML form, with it we can simplify our query statement implementation of some previously may need to rely on the function of a live

First, SQL Server Basic Introduction 1.1, overviewSQL Server is a relational database management system launched by Microsoft Corporation. With ease of use scalability and the high degree of integration of related software, you can span multiple

Pre-Preparation:CREATE TABLE Employee (ID int NOT null primary key,Name nvarchar (4),credit_card_id varbinary (max)); ---Be careful with this data type.GoDescription: The index on this table will be deleted before the next index is created.----------

List of city rankingsSELECTC.sheng, M.city, RANK () Over(ORDER by round(avg(cast(Indexs as float)),3)) aspx,round(avg(cast(PM25 as float)),0) PM25,round(avg(cast(PM10 as float)),0) PM10,round(avg(cast(Co as float)),3) CO,round(avg(cast(NO2 as float)

One, configure SQL Server1. Download the SQL driver and put the Sqljdbc4.jar into the JMeter installation directory/lib.2, start JMeter, right-click Add-config file->jdbc Connection configuration.3. Setting the JDBC Connection configuration property(

Requirements: 1. The table structure in the Excel table and database provided by the customer always has some gaps, the generation of IDs, the associations of various fields, etc.2.How to generate GUIDs in Excel.1. Execute the following code in the

Accessing SQL Server WMI objects1. Access using PowerShellGet-wmiobject-list-namespace "Root\microsoft\sqlserver" Get-wmiobject-list-namespace "Root\Microsoft\SqlServer\ Serverevents\mssqlserver "Get-wmiobject-namespace"

http://www.worlduc.com/blog2012.aspx?bid=730767Using C#sqlserver to realize adding and deletingUsing System;Using System.Collections.Generic;Using System.Text;Using System.Data;Using SYSTEM.DATA.SQL;Using System.Data.SqlClient;Namespace

Two ways to Centos7.3 SQL Server backup and restoreTwo of our previous articles described the installation configuration of SQL Server under Centos7.3 and the management of using PowerShell, and today we go on to implement SQL Server backup and

First, the chartCharacter string:Unicode string:Binary Type: Number Type:Date Type:Other data types: Second, the basic classificationFirst big class: Integer dataThe--bit:bit data type represents 0,1 or null, which means true,false. Consumes 1byte.--

//Windows authentication 1//string Strcon = @ "Data source=.\sqlexpress;initial catalog=db1;integrated security=true; Pooling=false "; //Windows Authentication 2//string Strcon = @ "server=.\sqlexpress;database=db1;integrated