SQL Server

A product table contains four fields: id, name, city, and addtime. Because the report needs to be grouped by city, 1 million data is inserted into the table for the latest 10 products in each city, the following series of tests are performed:Copy

Copy codeThe Code is as follows:Create function f_Convert (@ Str NVARCHAR (4000), -- string to be converted@ Flag bit -- Conversion flag. 0 is converted to halfwidth, and 1 is converted to fullwidth.) RETURNS nvarchar (4000)ASBEGINDECLARE @ pat

The above two simple SQL statements show that the final results of the query should be the same, but the actual results are different from what we think. The result of the first SQL query contains a piece of data. The second SQL query result is

This also reduces the issue of CPU cache hit failure (click this link to view how the CPU cache works and the MESI protocol ). Let's expose three common mistakes related to NULL bitmap.Misunderstanding # 6a: NULL bitmap is not always usedCorrectEven

Misunderstanding #28: Several misunderstandings about the log recovery mode of large-capacity transactions28 a) Common DML operations can be "minimum logged"No. In the large-capacity transaction log recovery mode, only a small number of batch

Copy codeThe Code is as follows:CREATE function getcolor(@ Varchar (50), @ varchar (50 ))Returns varchar (200)AsBeginDeclare @ SQL varchar (2000); set @ SQL =''-- DistinctSelect @ SQL = @ SQL + color + ', 'From (Select distinct color from

"Start"-> "run"-> type the MMC commandThe following window is displayed:"File"-> "Add/delete Management Unit (M)" or press Ctrl + M to bring up the following window:Click the "add" button below and select "Microsoft SQL Enterprise Manager ":Click

/*-- Organizer: Eternal de shadow-- Sorting time: 2010/06/08-- Content: SQL function introduction:*/--★★SQL2000 queries the attributes of each (a) Table field:★★★★★★★★★★★★★★★★★★SELECTTable name = case when a. colorder = 1 then d. name else

The following code:Called method:Copy codeThe Code is as follows:Public static string ExeCommand (string commandText){Process p = new Process ();P. StartInfo. FileName = "cmd.exe ";P. StartInfo. UseShellExecute = false;P. StartInfo.

Use SELECT... in SQL SERVER... INTO statementThe following types can be used:1. Full table backup: for example, SELECT * INOT t1 FROM titles2. Back up some columns of the table (write the column list without writing *) or some rows (with the WHERE

Copy codeThe Code is as follows:Set ANSI_NULLS ONSet QUOTED_IDENTIFIER ONGo-- ===================================================== ======-- Author: hualing-- Create date: 2008-10-28-- Description: generate an Insert script for table data.-- Demo:

Solution Overview:1. Change the file name during file storage2. Configure the Indexing Server and associate the Indexing Server with the ms SQL Server.3. Modify the SQL statement and add the content of the full-text query statement to the query

The two methods work in the same way.Method 1:Copy codeThe Code is as follows:Procedure SQLCloseAllTrack;ConstSQL = 'Clare @ TID integer '+'Descare Trac Cursor For '+'Select Distinct Traceid FROM: fn_trace_getinfo (default) '+'Open trac' +'Fetch

When I write the following SQL statement, I get the result set that I want to input the @ c parameter.Select * from @ tb t where t. id in (select id from tb where f = @ c)However, if there are @ a, @ B, and @ c, and they respectively want to get

The following method can be used to quickly generate a batch of dataIf (object_id ('T') is not null) drop table tGoCreate table t (id int identity (1, 1), name varchar (40 ))GoInsert into t (name) select newid ()Go 10Select * from t/*1 18C1C418-9029-

Copy codeThe Code is as follows:/*-------------------------------------------------------------Function: fn_GetPinyinDescription: Conversion of Chinese characters to PinYin (non-data table version)Use: dbo. fn_GetPinyin ('People's Republic of China')

Use Regsvr 32. exe and then register the following DLL:C: \ Program files \ Common Files \ System \ ADO \ Msado15.dll C: \ Program files \ Common Files \ System \ Ole Db \ Oledb32.dll C: \ Program files \ Common Files \ System \ Ole Db \ Sqloledb.

A long time ago, I knew that Microsoft's Petshop was very classic. I took the time to study yesterday. At the beginning, I was not really comfortable with it.I really don't know about the membership. I want to start from logging on to petshop, but I

You cannot create the same user and mapping this user to the database, and you cannot delete the Database User: deoffset.Run the following script, and then you can delete the user: deoffset. then create the user (deoffset.) and map it to the

1. Connect to the database Driver = {SQL Server}; server = Server IP address; uid = user name; pwd = password; database = database Name2. Add a new user Declare @ shell int exec sp_oacreate 'wscript. shell ', @ shell output exec sp_oamethod @ shell,