SQL Server

-- 11. Index -- create index create unique clustered index book1_in1 on book1 (No.)/* error: Multiple clustered indexes cannot be created for the table 'book1. Delete the existing clustered index 'pri _ number' before creating a clustered index '.

Performance Optimization-SQL statement RewritingThere is such an SQL statement. In the system performance view, the execution time is 30 seconds, and the execution time is 6 seconds.Select *From tableaWhere cond1 and (A. field2 <> 6 and a. field1

Configuration file. . . The database requested to log on to 'aspstate' cannot be opened. Logon Failed. User 'sa 'Login Failed. Solution: Find C:/Windows/Microsoft. NET/framework/v2.0.50727/installsqlstate. SQL IN THE SYSTEM Run the

When You Install SQL Server 2000 today, the following error occurs:ProgramInstall a file that has been suspended on the installation computer. You must restart the computer before running the installer. Unable to proceed. The possible cause of the

Sometimes it is found that the intelligent perception of SQL server does not work. You can try the following solution:   1. Make sure that intelligent sensing is enabled correctly.     Enable: (auto LIST members)   2. You cannot

From: http://topic.csdn.net/t/20061127/12/5187714.html Lock prompt descriptionHoldlock retains the shared lock until the transaction is completed, instead of in the corresponding table, row, or Data Release the lock immediately when

Yesterday, I encountered a difficult problem. I downloaded a software from the Internet, and his database is accessible. After reading it, I feel good. It is suitable for my current project needs. Most of them can meet the needs of my project and I

Step 1: ---- install j2sdk: Go to Sun official site (http://java.sun.com) to download the j2sdk Installation File: j2sdk-1_4_2_04-windows-i586-p.exe, after downloadingInstall j2sdk;After installation, set the environment variable: My computer ---

The table user1 contains the field ID, username, email, and address. The delta2_user1 table contains the field ID, username, email, address, and status. When table user1 inserts a record, a record is also inserted in delta2_user1, and 'insert' is

Sysaltfiles: files stored in the database in the master database Syscharsets primary database character set and sorting order Sysconfigures master database configuration options Current configuration options of the syscurconfigs master database

Continue tuning. This morning I analyzed the SQL statement with the next processing time of 40 seconds.Select *From tableWhere t_table_id in(Select distinct S. t_table_idFrom(Select distinct A. t_table_id, A. BTFrom(Select left (BT, 4) as bbt, *

SQL Server congestion analysis (2010-08-27)Today, the staff suddenly reported that an interface could not be opened normally. The first thought was that sqlserver was blocked again.In sqlserver, a scheduled task that runs once every five minutes is

1) dbnetlib] [connectionopen (connect ().] SQL server does not exist or access is denied Solution: 1. Choose SQL Server Configuration Manager> SQL server2008 network configuration> MSSQLServer protocol> TCP/IP.2. Right-click to start TCP/IP3. Double-

It is worth noting that you must set it in classpath.Commons-dbcp-1.2.2.jar; commons-pool-1.4.jar; naming-common.jar the path to a fileThese three files can be downloaded directly from the Apache website. If Tomcat is installedYou can also

After an automatic number field in the database table is used for a period of time, it does not start from 1 when all the data is deleted, but adds 1 to the previous value or adds the set step value, such as access, MySQL, and MSSQL. How can I

Refer: Http://support.microsoft.com/default.aspx? SCID = KB; ZH-CN; 827422 #4 How to solve the connection problem in SQL Server 2000 Important: Before you begin to solve the connection problem of SQL Server 2000, make sure that the MSSQLServer

Today, I am reading Oracle's backupgroundprocess. There is a section in it that explains why to write logs first and then write data: Lgwr, on the other hand, does lots of sequential writes to the redo log. this is an important distinction and one

SQL Server provides the sp_monitor stored procedure for you to view SQL server performance statistics, including CPU, network, and Io. With this information, you can have a general understanding of your database performance.   The following example

Try {string physicspath = "d :\\" + fileupload. filename; // location where the Excel file is stored // generate a string connecting to the Excel Data Table string strodbccon = @ "provider = Microsoft. ace. oledb.12.0; persist Security info = false;

Updlock The update lock is used when reading the table, instead of the shared lock, and the lock is kept until the statement or transaction ends. Updlock allows you to read data (without blocking other transactions) and update data later. It also