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Using the Sys.dm_sys_info view is often confusing to the Hyperthread_ratio column. What is the meaning of this column?Translation of an article of the foreign Great God, http://sqlblog.com/blogs/kalen_delaney/archive/2007/12/08/hyperthreaded-or-not.aspxIn my class or every time I do a performance consultant, I often get the question "How do I know if our SQL

Tag: SQL Server transaction is fullError description: The transaction log for the database is full. To find out why the space in the log cannot be reused, see the Log_reuse_wait_desc column in sys.databases.First introduce the concept of transaction log (from Baidu Encyclopedia):The transaction log

I have encountered such a problem in a project. In SQL Server, Images cannot be displayed when the image type is migrated to the Oracle blob type. I have read an image data in SQL Server. As follows: 1. SQL

The script is executed on the SQL Server on the client server today with an error message that "there was a problem executing the batch." The error message is: Directory name is invalid ", the first reaction

Only windows logon is selected when SQL Server is installed! But sometimes you also need to use the sqlserver logon method! [It is impossible to reinstall sqlserver.] 1. log on to sqlserver with windows, click "security" --> "Logon Name" --> "sa", and right-click the sa att

Tags: code page LocaleID 936Problem Description:Import the Chinese character set data through the SQL Server Import and Export Wizard, and encounter the LocaleID 4 is not installed on this system. Error.650) this.width=650; "title=" clip_image001 "style=" border-top:0px;border-right:0px;background-image:none; border-bottom:0px;padding-top:0px;padding-left:0px;bor

This article describes how to change the owner of a user-defined data type thatIs in use. To change the owner of a user-defined data type, you must dropAnd then re-create the data type in the context of the owner you want. However,If the user-defined data type is in use, you will receive the following errorMessage when you try to drop the Data Type: Server: MSG 15180, level 16, state 1, procedure sp_dropt

Like the session in. net, if you know the sessionID in the database, all operations will be known, because you have the unique identity. There are many things that can be done, such as: which user is doing what, what SQL is being executed, and how many stored procedures should be executed separately in a relatively large logic, In the process of executing these s

Table T1Start time End time09:00:00-12:00:0014:00:00-17:00:00Query whether the current server time is within the table T1 time period, if any, select theThe selected SQL result set is as follows, SQL, note: SQL2000 environmentStart time End time14:00:00-17:00:00 Method One:

Tags: find log sele exe serve Windows SQL database new madeSQL Server original Windows authentication cannot log on after the computer name is modifiedTags: database2016-09-26 15:04 1491 People read review (1) Favorite ReportCategory: DB Road--sqlserver (3)After renaming the computer, the SQL database cannot be used to

sent, which can sometimes cause the same record to be fetched simultaneously by multiple processes and sent.Today, we looked at the MSDN of SQL Server and found that it was possible to ensure that each record was read only once by updating it at the same time through the deleted table (as if it were used in a trigger).Declare @Rowid table (Rowid int);BEGINSET ROWCOUNT 100; --Number of rows read at one time

= 1 ; While @ I 1000 Begin Insert Into Student Values ( @ I , ' Zhangsan ' + Cast ( @ I As Char )) Set @ I = @ I + 1 ; End ; Go Because the ID column is set as the primary key, SQL Server automatically adds a clustered index to it. If we use the following statement to update table data, Begin Tran UpdateStudentSetName

The garden has a very good article about SQL Server transaction isolation, feeling a lot of the introduction from the concept, for those beginners, see the touch of understanding is profound, so no longer repeat, the emphasis is on the example demonstration above. The first explanation

Label:Constraints in SQL Server are used to ensure the integrity of the system. General constraints can be divided into:PRIMARY KEY constraintFOREIGN KEY constraintsCHECK constraintsDefault ConstraintsUnique constraintNon-null constraintBut in general we need to pay special attention to the first three constraints:A PRIMARY key constraint, which is a significant

A gas station management system developed by the company, written in C #, was previously developed using SQLSERVER2000, currently, the SQL Server 1.0 database is the same. The first version is 1.1, and the second version is, all are called GPOSDB, but the database of Version

In SQL Server, the Wal of the log is used to guarantee the persistence of relational databases, but because of the characteristics of the hard disk, it is not possible to write each log directly to disk once, so the log is cached to a certain amount of data before it