Python MySQL Database Connection using ODBC

I'm posting a sample python to Sql Server connection code. Here i will be using Python 2.7.

1. pip install pyodbc

2. Install the MySQL ODBC Connector from here.

3.  Setup ODBC connection details in Control Panel --> Admin Tools --> System DSN

4. Code :

from os import getenv

import pyodbc

conn = pyodbc.connect(r'Driver={MySQL ODBC 5.3 ANSI Driver};Server=127.0.0.1;Database=test;Trusted_Connection=yes;')

cur = conn.cursor()

string = "CREATE TABLE IF NOT EXISTS TestTable(empname varchar(15), sal double)"

cur.execute(string)

sqlStatement = "INSERT INTO TestTable(empname,sal)  VALUES (?, ?)"

cur.execute(sqlStatement, ('chandan', '1000'))

conn.commit()

4.Run python code.py in CMD

Python MSSQL Database Connection using ODBC

I'm posting a sample python to Sql Server connection code. Here i will be using Python 2.7.

1. pip install pyodbc

2. Code :

from os import getenv

import pyodbc

conn = pyodbc.connect(

    r'DRIVER={ODBC Driver 11 for SQL Server};'

    r'SERVER=TEST;'

    r'DATABASE=SampleDB;'

    r'UID=sa;'

    r'PWD=***'

    )

cursor = conn.cursor()

cursor.execute("""

IF OBJECT_ID('persons', 'U') IS NOT NULL

    DROP TABLE persons

CREATE TABLE persons (

    id INT NOT NULL,

    name VARCHAR(100),

    salesrep VARCHAR(100),

    PRIMARY KEY(id)

)

""")

cursor.executemany(

    "INSERT INTO persons VALUES (?, ?, ?)",

    [(1, 'John Smith', 'John Doe'),

     (2, 'Jane Doe', 'Joe Dog'),

     (3, 'Mike h', 'Sarah H')])

# you must call commit() to persist your data if you don't set autocommit to True

conn.commit()

cursor.execute('SELECT * FROM persons WHERE salesrep=?', 'John Doe')

row = cursor.fetchone()

while row:

    print("ID=%d, Name=%s" % (row[0], row[1]))

    row = cursor.fetchone()

k

conn.close()

3.Run python code.py in CMD

MongoDB Query to find record using greater $gt or less than $lt operators and then sort

MongoDB Query to find record using greater $gt or less than $lt operators and then sort

Query
db.grades.find({"score":{$gt:65}},{"score":1,student_id:2,}).sort({"score:1})

grades is the collection.

sample interface for inserting data into mongodb using node.js

1. Below is the npm module(mongodb) link which i used to create a basic interface for inserting
documents into mongodb collections using node.js

https://www.npmjs.com/package/mongodb

2. I have been using RoboMongo GUI for viewing into MongoDB Database.

Steps:

1. install node.js and mongodb 
2. create a new folder and access it thru terminal/Cmd
3. Now type npm init, it will ask you certain things and will create a package.json based on your input values.
4. mention the required dependencies for mongodb in package.json file.
5. Create a new file called index.js , and paste this below code

6. final step to run the node.js interface from the terminal type --> node index.js 

package.json

{

  "name": "mongoapp",

  "version": "1.0.0",

  "description": "new mongo",

  "main": "index.js",

  "scripts": {

    "test": "echo \"Error: no test specified\" && exit 1"

  },

  "keywords": [

    "mongo"

  ],

  "author": "chandan",

  "license": "ISC",

   "dependencies": {

    "mongodb": "~2.0"

  },

}

index.js

var MongoClient = require('mongodb').MongoClient

  , assert = require('assert');

 

// Connection URL 

var url = 'mongodb://localhost:27017/mydb';

// Use connect method to connect to the Server 

MongoClient.connect(url, function(err, db) {

  assert.equal(null, err);

  console.log("Connected correctly to server");

  insertDocuments(db,logStuff);

});

function logStuff(result)

{

console.log(result);

}

var insertDocuments = function(db, callback) {

  // Get the documents collection 

  var collection = db.collection('documents');

  // Insert some documents 

  collection.insert([

    {a : 1}, {a : 2}, {a : 3}

  ], function(err, result) {

    assert.equal(err, null);

    assert.equal(3, result.result.n);

    assert.equal(3, result.ops.length);

    console.log("Inserted 3 documents into the document collection");

    callback(result);

  });

}

Executing JAR file using Batch Command(.bat)

Below is the script to run a JAR file using a .bat command, copy and paste it into the notepad and then save as batch_file_name.bat

@echo OFF
cd C:\upload
java -jar compareRun.jar
pause

line 2 is the folder path for jar file, please change as per your requirements.
line 3 is the actual execution of the jar file
line 4 would avoid closing of console, so you can view the output.