node js sql server example

Nodejs is a simple chat server. The implementation code is as follows: Var net = require ('net'); var chatServer = net. createServer (), clientList = []; chatServer. on ("connection", function (client) {client. name = client. remoteAddress + ":" + client. remotePort; client. write ("Hi! "+ Client. name + "\ n"); clientList. push (client); client. on ("data", function (data) {// send data to the client broadcast (data, client); // clientList [I]. write

Directly on the code, this is the first version, you can judge the extensionvarHTTP = require (' http ');varExpress = require (' Express ');varFs=require ("FS");varPath=require ("Path");varMIME = require (' MIME '));varApp =Express ();varCurrdir = ' F:\\users\\djyk\\74dj.mp3 '; App.get (‘*‘,function(req, res, next) {varReqpath =decodeURI (Req.path); Console.log (Reqpath); varfilepath =Path.join (Currdir,reqpath); Fs.lstat (filepath,function(err, stat) {if(err) {if(Err.code = = = ' ENOENT ')) {R

Example of deleting duplicate records in a data table in SQL Server, SQL Server [Project] The users table in the database contains the u_name and u_pwd fields. The u_name contains duplicate items. Now we need to delete duplicate items! [Analysis] 1. Generate a temporary tabl

The backup job generated by the tool is running normally for many months, but was told by another database engineer that it was not running for a while, so it was disabled. The history log is as follows: There is a key in the error prompt, and so on, but I have not generated a key or something. The cause is that the protection level specified by the package is incorrect. Solution: 1. log on to the server, click Register

SQL Server creates a stored procedure example for the linked Server, and SQL stored procedure Create a linked server. The linked server allows you to perform distributed heterogeneous

---SQL SERVER 2000 Calendar Parent-child relationship tables (binary tree) get all parent nodes and node layer functions for all child nodes---geovin Du tu ju wen--Building a test environmentCreate Table Geovindu([ID] Int,Fatherid Int,[Name] Varchar (10))Insert A Select 1, 0, ' China 'Union All Select 2, 1, ' Guangdong 'Union all Select 3, 1, ' Beijing 'Union all

Example of recursive calling of stored procedures in SQL Server: SQL Server Stored Procedure Recursion refers to the situation where a code snippet calls itself. The danger lies in how to prevent it from repeatedly calling itself if it calls itself once. That is to say, rec

OK, now let's see how to generate FullPath: Copy Code code as follows: DECLARE @tbl TABLE ( Id int , ParentID int ) INSERT into @tbl (Id, ParentID) VALUES (0, NULL) , (8, 0) , (12, 8) , (16, 12) , (17, 16) , (18, 17) , (19, 17) with ABCD As ( --Anchor SELECT ID , ParentID , CAST (id as VARCHAR) as [Path] From @tbl WHERE ParentID is NULL UNION All --recursive Member SELECT t.id , T.parentid , cast (A.[path] + ', ' + cast (t.i

it is necessary to return the total number of records, and if set to 1, returns two result tables) as Beg In declare @sqlcount nvarchar (+), @sqlstring nvarchar (max) set @sqlstring =n ' from (select Row_number () over (order by ' + @orderbysql + n ') as rowId, ' + @selectsql + N ' from ' + @fromsql +n ') as T ' if (@returnrecordcount =1) begin SE T @sqlcount =n ' select count (rowId) as Resultcount ' + @sqlstring exec (@sqlcount) End set @sqlstring =n ' select * ' + @sq Lstring + ' where rowI

FCI Two-node cluster, because the network outage between the cluster nodes at night, two nodes are considered another node outage, in the cluster management of each node has seen the other side has been down.Connect to the cluster IP to indicate a problem with the msdb database:Discovery of the msdb database "suspicious"Msdb is damaged, MSSQL error logs and agent

SQL Server, db2, and oracle Stored Procedure dynamic SQL statement example Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any

SQL server, db2, oracle Stored Procedure dynamic SQL statement example, db2oracle Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d: = 'G'; -- any

name and its corresponding role name. Right-click the solution-add-new folder (ViewModel), then right-ViewModel the folder--add--class to create a new Userrole class, and add the following entities:Namespace Mvcdemo.viewmodels{public class Userrole{public string UserName {get; set;}public string Userrole {get; set;}}}Right-click the Controllers folder to add a control class that inherits from the Controller classAdd the following code (federated Query with LINQ to entity two tables):Using Syste

SQL Server has an SQL profiler that can track the SQL statements executed by the server in real time, which is useful in many times for debugging errors. For example, the complexity of othersCode, Production system, no debugging e

SQL Server uses exec to process SQL strings containing variables. Prompt: the scalar variable @ must be declared (solved !)Copy codeThe Code is as follows:Declare @ tssj nvarchar (100) -- external variableDeclare @ SQL _ SQL nvarchar (100) -- save

procedure", a template-based creation statement will appear. Click "query> specify template parameter value" in the menu to bring up a dialog box to set the template and create the stored procedure. In addition, click "View> template resource manager" in the menu to view the various SQL statement templates provided by SQL SERVER. [A simple

ArticleDirectory Comment Data Synchronization processing (using SQL Server 2000 as an example) 1. Main Purpose Data synchronization between two or more servers 2. Method Use the database replication method to synchronize data through publishing, distribution, and subscription. 3. Steps 1. Configure distribution and release servers (ensure

Label:SQL Server Operations XML example /*Getting Started with SQL xml:--by jinjazz--http://blog.csdn.net/jinjazz 1, xml: Can recognize elements, attributes, and Values 2, XPath: Addressing language, similar to the Search for Windows directories (wall) syntax format, which can be combined as a condition: "." Express Yourself, "..." Represents the father, "/" for

* FROM Sys.server_audit_specifications --Server Audit Specification Object SELECT * from Sys.server_audit_ Specification_details --Audit action of the server Audit specification object SELECT * from Sys.database_audit_specifications --Database Audit Specification Object SELECT * FROM Sys.database_audit_specification_details --Audit action for Database Audit specification Object SELECT * from Sys.dm_aud

Your current location: homepage tutorial Programming Development mssql database SQLServer basic syntax instance application (3) SQLServer basic syntax instance application (3) thanks to 3lian8 delivery time: Source: triple tutorial 3. Develop applications 1. sort by surname strokes: Select * FromTableNameOrderByCustomerName Your current location: Home> tutorial> programming and development> mssql database> SQLServer basic syntax instance application (3) SQLServer basic syntax instance applicatio