SQL Server

1. To optimize the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order. 2. Try to avoid null value determination on the field in the WHERE clause. Otherwise, the engine will

If you want to remember the records in a table for random display, or randomly extract a record, we do not need to write a long stringProgramCodeHow can we create a random number and then make a so-called "random record"? You only need to use a

Today, I accidentally uploaded the Excel Data to SQL Server. Yu Feng said that it is essential to keep a low profile to learn a technology. It cannot be known that it was just a meeting ~~~~~~~~ Hey !!!   If (Fileupload1.hasfile) // If

  I encountered a requirement in my work. I had to query the table structure, index, and primary key, but it was suddenly difficult because the script I wrote for the first time was only compatible with SQL Server 2005, in SQL Server 2000, an error

When I started RDA today, I was told that I could not synchronize data. It turned out to be a result of this problem and was recorded.SQL Server 2005 compact edition books online How to install the SQL Server replication component   This

Clustered index,The data stored in the table is stored in the order of indexes. the retrieval efficiency is higher than that of normal indexes, but it has a greater impact on the addition, modification, and deletion of data. Non-clustered IndexDoes

Occasionally:   {"A transport-level error has occurred when processing ing results from the server. (provider: TCP provider, error: 0-the specified network name is no longer available .) "} System. Exception {system. Data. sqlclient. sqlexception}

If a trigger triggers another trigger while executing the operation, the trigger then triggers the next trigger ...... These triggers are nested triggers. The trigger can be nested to 32 layers, and can control whether the trigger can be nested

I don't know when to start, My SQL Server 2000 always stops automatically, so I am very worried. I have ruled out the virus and other reasons. I searched the internet and found it was the fault of mdac2.8, you only need to reinstall it. After mdac2.8

In this article we will learn how to convert table rows into columns as comma seperated. -- Create a table variable to store user dataDeclare @ mytable table(Username varchar (50 ),Articlename varchar (50)) -- Insert

· @ Connections Returns the number of connections that have been connected to or attempted to connect to SQL Server since the last time SQL Server was started. · @ Cpu_busy Returns the CPU time in milliseconds since the last time SQL Server

1. Import or export data using the DTs designer The DTS designer is powerful and supports multi-task operations. It is also a visual interface and easy to operate. However, there are not many people who know it. If you only want to move the

-- Full backup database northwindcsto disk = 'G: \ backup \ northwindcs_full_20070908.bak '-- Differential backup database northwindcsto disk = 'G: \ backup \ northwindcs_diff_20070908.bak' with differential -- log backup, backup log northwindcsto

Every time we use the query analyzer to debug SQL statements, we usually see some information, reminding us how many rows are affected currently. What information is this? Is this information useful when we call it? Can I disable it? The answer is

1. query Excel Data in SQL Server: -- ===================================================== ==================== Select * From OpenDataSource ( 'Microsoft. Jet. oledb.4.0' , 'Data source = "C: \ book1.xls"; user id = admin; Password =; extended

  0. Introduction SQL Server provides SQL tracking and Event Notification to monitor events in the database engine. By recording specified events, SQL tracking helps you solve performance problems, review database activities, collect sample data

Differences between varchar and nvarchar: Varchar (N)Variable-length and non-UNICODE character data with a length of n Bytes. N must be a value between 1 and 8,000. The storage size is the actual length of the input data bytes, rather than n Bytes

DBO is not the owner of the table casetable, so it cannot execute various SQL statements in the query analyzer. The prompt is:Server: Message 208, level 16, status 1, Row 1The object name 'casetable' is invalid. Generally, the default owner of a

1. SQL Server Installation Error: a previously installed program has created a suspended file on the computer. You must restart the computer before running the installer.   Install SQL Server 2000 Personal Edition for development, but each

If you have written many programs, you may occasionally encounter the need to determine whether the character or character string is contained in a paragraph of text. In this article, I will discuss how to use the charindex and patindex functions to