Node. js for mysql database operations

NodeJS operation MySQL1. create a table in the database (lzq in example) (teachers in example ). 2. Install the MySQL driver for nodeJS: npminstallmysql; 3. Run the startSQL. js file: nodestartSQL. js4. test environment: node. js0.... Synta

NodeJS for MySQL operations

1. Create a table (such as teachers) in the database (such as lzq ).

2. Install the MySQL driver for nodeJS:
Npm install mysql;

3. Execute the startSQL. js file:
Node startSQL. js

4. test environment:
Node. js 0.6.12

5. A total of two js files: startSQL. js and CRUD. js.

StartSQL. js --------------------------------->
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Var CRUD = require ('./CRUD '),
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Sys = require ('util '),
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Client = require ('mysql'). createClient ({'host': 'localhost ',
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& Apos; port: 3306,
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'User': 'root ',
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'Password': 'admin '}),
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ClientConenctionReady = function (client ){
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Var value = ['10', 'fillp ', 'abc'],
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InsertSQLString = 'insert into teachers SET id = ?, Name =? , Pwd =? ',
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SelectSQLString = 'select * from teachers ',
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UpdateSQLString = "update teachers set NAME = 'ipone' where ID = 4 ",
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DeleteSQLString = 'delete from teachers where ID = 10 ';
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Console. log ('clientconnectionready '),
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Console. log ('\ n ')
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// Lzq is the name of database.
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Client. query ('use lzq', function (error, results ){
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If (error ){
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Console. log ('clientconnectionready Error: '+ error. message ),
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Client. end ();
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Return;
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}
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Console. log ('ing ing to MySQL ...'),
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Console. log ('ted CTED to MySQL automatically '),
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Console. log ('\ n '),
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Console. log ('Connection success ...'),
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Console. log ('\ n '),
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Client. end (),
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Console. log ('Connection closed '),
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Console. log ('\ n ');
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});
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};
CRUD. js ---------------------------------->

View sourceprint?
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Var CRUD = {
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_ Insert: function (client, insertSQLString, value)
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{
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Client. query (insertSQLString, value, function (error, results)
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{
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If (error)
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{
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Console. log ("ClientReady Error:" + error. message ),
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Client. end ();
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Return;
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}
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Console. log ('inserted: '+ results. affectedRows + 'row .'),
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Console. log ('insert success ...');
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}
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);
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},
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_ Select: function (client, selectSQLString)
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{
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Client. query (selectSQLString, function selectCb (error, results, fields)
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{
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If (error)
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{
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Console. log ('getdata Error: '+ error. message ),
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Client. end ();
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Return;
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}
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If (results. length> 0)
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{
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Var firstResult,
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ResultSet = '';
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For (var I = 0, len = results. length; I <len; I ++)
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{
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FirstResult = results [I],
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ResultSet + = 'id: '+ firstResult ['id'] + ''+ 'name:' + firstResult ['name'] +'' + 'pwd: '+ firstResult ['pwd'] +' \ n ';
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}
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}
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Console. log (resultSet );
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/* Add function: return the query result set to the client and ensure the universality of this function .*/
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}
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);
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},
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_ Update: function (client, updateSQLString)
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{
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Client. query (updateSQLString, function (error, results)
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{
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If (error)
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{
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Console. log ("ClientReady Error:" + error. message ),
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Client. end ();
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Return;
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}
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Console. log ('Update success ...');
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}
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);
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},
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_ Delete: function (client, deleteSQLString)
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{
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Client. query (deleteSQLString, function (error, results)
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{
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If (error)
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{
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Console. log ("ClientReady Error:" + error. message ),
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Client. end ();
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Return;
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}
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Console. log ('delete success ...');
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}
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);
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}
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};
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Exports. _ insert = CRUD. _ insert,
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Exports. _ select = CRUD. _ select,
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Exports. _ update = CRUD. _ update,
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Exports. _ delete = CRUD. _ delete;

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