SQL Server

Official definition functions: Hashbytes ( '', { @input | 'input' } )::= MD2 | MD4 | MD5 | SHA | SHA1Parameter explanation:Algorithm: Identifies the hashing algorithm used to perform a hash operation on the input. This is a required parameter with

recently the computer upgraded the operating system, reinstall the next SQL Server database, unexpectedly appear repeatedly Tip You need to install the. NET Framework 3.5 SP1, witty I decisive Baidu a bit, put out my solution:I. First install the.

There can is types of duplication of rows in a table1. Entire row getting duplicated because there is no primary key or unique key.2. Only primary key or unique key value is different and remaining all values are same.Scenario 1:delete duplicate

ObjectiveAbout SQL Server Tuning series is a huge content system, not a word two words can be analyzed clearly, this article first in the SQL tuning in the most commonly used query plan to parse, to do a good job of the basic grasp, tamping basic

PHP connection to MS SQL Server under LinuxAnalyze problemsPHP scripts Read and write SQL Server is not a problem, in Apache for Windows and Windows IIS can work very well, generally can be connected via ODBC or SQL Server client, which is available

Problems encountered in a project: The system log is too large, and later deleted with the DELETE statement (rather slow), the results of the database log becomes very large (almost 10G), so you have to delete the database log.Method:--partial logs

Quickly delete duplicate records in SQL Server 2006-07-17 21:53:15Category: SQL Server 　　 Developer's Nightmare-delete duplicate recordsPresumably, every developer has had a similar experience, when querying or statistics of the

Before encountering a statement like thisDeclare @t1 table (catId int, id int) insert INTO @t1 (Catid,id) VALUES (15,33), (15,49), (15,113)SQL Server 2000 and 2005 ran, all error--line 3:incorrect syntax near ', '.Later, this is a new feature of SQL

Requirements DescriptionGenerally in the production environment, in the case of put into operation, need batch to execute SQL script file, to complete the whole production, if the production file more than the case, undoubtedly this is a more

Recently have been looking at SQL Server books, but look at the basic query flow, query in the work of the most, so it is important to correctly query the desired data.See in the book in SQL Server 2012 a new implementation of paging Query method,

; with Tran_locks as (Select Resource_type,db_name (resource_database_id) as Db_name,resource_description, object_name (resource_associated_entity_id,resource_database_id) as Object_name,request_mode,request_type,

To do a JDBC request, first understand what this JDBC object is, and then look for the database connection URL and database driver for the response.Database Url:jdbc:sqlserver://200.99.197.190:1433;databasename=ebankDatabase driver:

Detailed description of server role and database role permissions in SQL ServersTransferred from: http://blog.csdn.net/e_online/article/details/4597957Roles when several users need to perform similar actions in a particular database (there is no

ObjectiveIn this section we analyze the left join and not EXISTS, short content, in-depth understanding, always to review the basics.Left JOIN ... Is null and NOT EXISTS analysisWe have previously analyzed that in query processing null value is

Method One: Using the graphical operation (GUI), open ssms (SQL Server Management Studio) The first step: Right-click the database you want to downgrade, press Select:Step Two: In the dialog box, in advanced, set as follows.Step three: Save the

Analysis of SQL Server's focus on using indexes and query execution plans and SQL Execution plans Preface In the previous article "Analysis of the Impact of SQL Server focused indexes on non-clustered indexes", we talked about the impact of

SQL Server query and Kill deadlock statement, sqlserverkill Query deadlock process statements select request_session_id spid, OBJECT_NAME(resource_associated_entity_id) tableName from sys.dm_tran_locks where resource_type='OBJECT' Statement used to

SQL Performance Optimization-Methods for locating network performance problems (DEMO) and performance optimization demo Recently, my colleague from the project team told me that he encountered an SQL Performance problem. He said that there were only

Installing SQL Server 2014 in Win10 repeatedly prompts you to install. NET Framework 3.5 SP1 solution, win102014 1. First install. NET Framework 3.5 Offline installation method: 1. Mount the corresponding system installation disk. I am a Windows 10x6

T-SQL statement to modify the logic name, database name, and physical name of the SQL Server database, t-sqlsql This example describes how to modify the logical name, database name, and physical name of the SQL Server database using the T-SQL