SQL Server

Enter the query window and enter the following statement:Create index mycolumn_index ON mytable (myclumn)This statement creates an index named mycolumn_index. You can give an index any name, but you should include the field name of the index in the

Many SQL Server programmers are confused about the use of subqueries, especially nested subqueries (that is, subqueries contain a subquery ). Now let's trace this problem.There are two subquery types: standard and related. The standard subquery is

1. Simple QueryA simple Transact-SQL query only includes the select list, FROM clause, and Where clause. They respectively describe the queried columns and the queriedTables or views, and search conditions.For example, the following statement

Copy codeThe Code is as follows:/*Database paging stored procedures, supporting reverse and ascendingParameter description:@ Tablename: name of the search table@ Tablefield: Specifies the table field, which is the table's primary key,@ Where: The

1. Set the client network utilityClick "start"-"program", and select "client network utility" from the "Microsoft SQL Server" menu ". Click "add" in the "alias" option ". In "server alias", enter your website domain name, click "TCP/IP" in the

Copy codeThe Code is as follows:Xp_cmdshell allows the system administrator to execute a given command string in the form of an operating system command line interpreter and return any output in the form of text lines. It is a powerful extended

Create a table:Create table [table name]([Automatic number field] int IDENTITY (1, 1) primary key,[Field 1] nVarChar (50) default 'default value 'null,[Field 2] ntext null,[Field 3] datetime,[Field 4] money null,[Field 5] int default 0,[Field 6]

The table structure is as follows:Qty date----------------------------------------------13 2005/01/1715 2005/01/193 2005/01/251051 2005/01/31352 2005/02/0312 2005/02/042556 2005/02/181 2005/02/1928 2005/02/211 2005/02/2239435931332554468 2005/02/282

1. Change the bit type of the SQLSERVER database to not Boolean (that is, change true to false; change false to true)Example: update table set bit field = bit field-1Recently, a friend asked me that it was very slow for him to delete millions or

Required tools: SQL Query Analyzer and SqlExec Sunx Version　　Part 1:　 Summary on How to Remove xp_cmdshell to protect the system:First, let's know the statement:1. To remove the xp_cmdshell extension process, use the following statement:If exists

Delete duplicate records and save the non-Repeated Records in TABLE_NAME to # TABLE_NAMESelect distinct * into # table_name from table_nameDelete from table_nameSelect * into table_name from # table_nameDrop table # table_nameThis is related to the "

Previously, I was not very clear about the data sets produced by the inner connection and outer connection in MSSQL. I have reviewed SQL books over the past few days. Now I think it is clear that I am going to give my understanding to you. I hope

I. Available when viewing the Instance name 1. Service-SQL Server (Instance name), default instance: (MSSQLSERVER) Or you can view the local instance when you connect to enterprise management. 2. Through the notebooks

Copy codeThe Code is as follows:-- 1. enable full-text index of SQL Server for the databaseEXEC sp_fulltext_database 'enable' -- 2. Create a full-text directory-- (If the error "full-text search not installed or a full-text component cannot be

1. Determine whether a database table exists: Obtain the database connection conn, call DatabaseMetaData dbmd = conn. getDataMeta (), and then call the following method:Copy codeThe Code is as follows:/*** Determines whether a database table exists

Copy codeThe Code is as follows:DECLARE @ OldId varchar (50)DECLARE @ CustomerID varchar (50)DECLARE My_Cursor CURSOR -- defines the CURSORFOR (select CustomerID, oldid from Customer where Area = 'bj ') -- locate the desired set and put it in the

1. In the first case, replace all the specified injection strings (only the injected strings are empty)Copy codeThe Code is as follows:Declare @ delStr nvarchar (500)Set @ delStr = '' -- the injected field string/*************************************

These stored procedures are as

SQL refers to the structured query language. Its main function is to establish connections with various databases for communication. query refers to requests for data stored in SQL. The query task is to provide the result set of the Select statement

Create an excelfile aa.xls in the einventory directory and test the following code:Copy codeThe Code is as follows:Use tempdbGoIf (object_id ('udf _ getExcelTableNames ') is not null)Drop function dbo. udf_getExcelTableNamesGoCreate function