SQL Server

"User-defined functions" are common statements, while "user-defined functions" are written in SQL Server.SQL Server 2000 allows users to create user-defined functions. User-defined functions can return values.User-Defined Functions are classified

1. SQL Server Import and Export wizard. This method is the most convenient.Import wizard, Microsoft provides a variety of data Source drivers, including SQL Server Native Cliant, OLE DB For Oracle, Flat File Source, Access, Excel, XML, etc, it can

Database:0.3 million, with an ID column but no primary key, a non-clustered index is created on the "category" field to be searchedProcess T-SQL: Copy codeThe Code is as follows:/*User-Defined Function: the execution time is

SQL2005 Express has no "Enterprise Manager" or "query analyzer 」SQL2005 is divided into five versions, as listed below:1. Enterprise (Enterprise Edition)2. Development (Development Edition)3. Workgroup, (Work Group version)4. Standard, (Standard

You can log on with a windows account.Troubleshooting process:Step 1: Start all SQL-related services, and the problem persists;Step 2: view the windows Firewall, Which is started by default. If the option is Disabled, it is Disabled. The two prompts

Substring function is used for SQL Server operations.SUBSTRING (expression, start, length)ParametersExpressionString, binary string, text, image, column, or expression that contains a column. Do not use expressions that contain aggregate

That is, when logging on to a website as a tourist, the shopping cart is stored as a cookie, and the shopping cart information is stored in the database as a logon user, if the shopping is completed as a tourist and then the shopping continues, the

Datetime and smalldatetimeRepresents the date and time data types of the date and the time within the day.Microsoft SQL Server uses two 4-byte Integers to store values of the datetime data type. The number of days before or after the first 4-byte

The table structure is as follows:Number date8 2009/1/117 2009/1/116 2009/1/11 12: 005 2009/1/114 2009/1/12 4:003 2009/1/12 10: 002 2009/1/12 12:001 2009/1/11The result is as follows:Difference23Copy codeThe Code is as follows:Create table #

SQL xml entry: -- by jinjazz1. xml: Recognition of elements, attributes, and values2. xpath: Addressing language, similar to windows Directory Search (go to the wall without using the dir command)Syntax format. These syntaxes can be combined into

Make sure that the data type in the Code is consistent with the column type in the databaseIt is important to ensure that the data types at each layer of your application are consistent. For example, if the data type of a column is NVARCHAR (50),

SUBSTRINGReturns a part of a character, binary, text, or image expression. For valid Microsoft®SQL Server™For more information about data types, see data types.SyntaxSUBSTRING (expression, start, length)ParametersExpression Is a string, binary

The first error "SQL Server does not exist or access is denied" is usually the most complicated. There are many causes of the error and there are many aspects to check. Generally, there are several possibilities:1. the SQL Server name or IP address

I. Problems Student table: course schedule: Id name course number (foreign key) course number, course name '1', 'xix ', 1 1, 'China''2', 'cic ', 2 2, 'mat''3', 'ddi ', 4 3, 'English' Combine the student table and curriculum into a new table

When installing sql2000, a previously installed program that has been suspended on the computer has been created. You must restart the computer before running the installer.The installation of sql2000 is because it was installed on win2003, and an

How to compress the database backup files of SQL Server, like rar? The younger brother has a 7 m SQL server2000How do I compress database backup files in a program?Copy codeThe Code is as follows:Procedure TForm1.Button2Click (Sender: TObject

Convert datetime to stringCopy codeThe Code is as follows:Select CONVERT (varchar (100), GETDATE (), 0): 05 16 2006 AMSelect CONVERT (varchar (100), GETDATE (), 1): 05/16/06Select CONVERT (varchar (100), GETDATE (), 2): 06.05.16Select CONVERT

Method 1: (this is the most commonly used, because many of the content in a large segment uses data types such as text ntext, and we usually Replace the content in it) Varchar and nvarchar support replace, so if your text does not exceed 8000, you

1. Data and log files are stored separately on different disks. Operations on data files and log files generate a large amount of I/O. If possible, log files should be stored on a hard disk different from the data files where the data and indexes

Copy codeThe Code is as follows:Declare @ t varchar (255), @ c varchar (255)Declare table_cursor cursor for select a. name, B. nameFrom sysobjects a, syscolumns B, policypes cWhere a. id = B. id and a. xtype = 'U' and c. nameIn ('Char ', 'nchar',