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hope this article will help you write a better database application and help you gain a deeper understanding of the database performance issues you are experiencingSQL Server is a platform for the C/S model. The only way to interact with the database is to send requests that contain database commands to the database server side.The Protocol for client and databa
An overview
By default, the SQL Server Agent creates error logs to record warnings and errors. The following warnings and errors are displayed in the log:
A warning message that provides information about a potential problem, such as "a job is deleted when it is executed."
Error messages, which typically require system administrator intervention, such as "Unable to start a mail session." You can
As a performance tool of the Microsoft SQL Server database series, SQL Server Profiler can track the running status of databases in real time and find slow queries or deadlocked SQL statements, to optimize the system. This article describes how to use Silverlight to monitor
stored procedures, scalar value user-defined functions, or extended stored procedures. SQL Server 2005 extends the EXECUTE statement to send commands to the linked Server. in addition, you can explicitly set the context for executing strings or commands.
SP_EXECUTESQL
Execute a statement or batch process that can be
Label:Original: Chapter 1 securing Your Server and Network (7): Disable SQL Server BrowseSource: http://blog.csdn.net/dba_huangzj/article/details/38227187, Special catalogue:http://blog.csdn.net/dba_huangzj/ article/details/37906349No person shall, without the consent of the author, be published in the form of "original" or used for commercial purposes, and I am
queue.
For each partner server, the sends/sec and receives/sec counters indicate how many send and receive actions bytes sent/sec and bytes received/sec counters indicate the number of bytes that are included in the send and receive actions on each partner server.
Estimated redo and catch-up time
We often use a table to store the data to be sent when we are doing some kind of business, such as sending SMS and mail, and the data sent from the table is continuously read by multiple threads in the background. After sending, the data is transferred to the history table so that the data to be sent will not be too much in normal circumstances. If the table structure to be sent is:Create Table SMS (ID int
, SQL Server Profiler is used to call for the use of SQL stalking. You can also use the Transact-SQL system storage process to pay a visit. SQL Server Profiler is able to use all of the things that
specifies to reference the ODBC Data Source of the target SQL Server in its connection string. In this case, the application communicates with ole db, while the ole db provider of ODBC calls the corresponding odbc api for session with SQL Server.
ADO. NET
ADO. NET applications usually use. NET Framework Data Provider
buffering or table buffering).
Send updates (whether successful or not)
As you can imagine, when a process opens a remote view, Visual FoxPro automatically presses the data values of SQL Server into the cache at this time, and the process says: My modifications to the data on SQL
same time to fetch data from the table to be sent, which sometimes causes the same record to be fetched by multiple processes at the same time. and send the case.Check out the MSDN for SQL Server today. Discovery can be removed by first updating the same time through the deleted table (as if it were used in a trigger). To ensure that each record is read only onc
Server
IDispatch COM components can be invoked in the Sql-server
Interested in the use of SQL Help to check the sp_OACreate, sp_OAMethod, sp_OADestroy and other stored procedures.
Below is I in a short message alarm in a small project of some SQL code, alarm information thro
2005 extends the EXECUTE statement to send commands to the linked Server. In addition, you can explicitly set the context for executing strings or commands.
SP_EXECUTESQL
Execute a Transact-SQL statement or batch process that can be repeatedly used or dynamically generated multiple times. Transact-SQL statements or ba
Post a translation FAQ (if I can write this level ...), This step is almost applicable to the most common SQL connection problems. FAQ: Check for SQL connection errors. Q: I have encountered many SQL connection errors. Is there a wizard to solve the connection problems? A: basically, when you cannot connect to your SQL
can also complete management tasks or other system management tasks related to updating database tables. The system stored procedure can be executed in any database. The system stored procedure is created and stored in the system database master, and the name starts with sp _ or xp.
Some examples of system stored procedures are as follows:Sp_addtype: defines a user-defined data type.Sp_configure: used to manage server configuration option settings.Xp
Dynamic SQL: code that is executed dynamically. It is generally an SQL statement block dynamically combined based on user input or external conditions. Dynamic SQL can give full play to the powerful functions of SQL and easily solve problems that are difficult to solve by other methods. I believe that anyone who has us
Original source: http://blog.csdn.net/dba_huangzj/article/details/38227187, featured catalogue:http://blog.csdn.net/dba_huangzj/article/details/37906349 No person shall, without the consent of the author, be published in the form of "original" or used for commercial purposes, and I am not responsible for any legal liability. Previous article: http://blog.csdn.net/dba_huangzj/article/details/38082123 Objective: The SQL
Today wrote a SQL to get three times to calculate success, is previously written sq himself l never noticed, left joinDECLARE @SendIntervalDays int, @OrderIntervalDays int, @OrderDate DATETIMESET @SendIntervalDays = 7--SMS Send Interval daysSET @OrderIntervalDays = 30--The number of days the order has been signedSET @OrderDate = ' 2014-12-12 '--order timeSELECTO.
the third SQL Server called witness. Witness can be used as a common SQL Server, but it keeps an eye on the other two image servers. When the primary image fails, witness allows the second image to take over the operation, similar to an automatic failover.
During failover, any client transaction in progress will be re
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