Sqlite3 Module

Getting the values from the database and Error handling

Fetching the values from the SQLite3 database.

Print row values returned by select query

import sqlite3
conn = sqlite3.connect('example.db')
c = conn.cursor()
c.execute("SELECT * from table_name where id=cust_id")
for row in c:
    print row # will be a list

To fetch single matching fetchone() method

print c.fetchone()

For multiple rows use fetchall() method

a=c.fetchall() #which is similar to list(cursor) method used previously
for row in a:
    print row

Error handling can be done using sqlite3.Error built in function

try:
    #SQL Code
except sqlite3.Error as e:
    print "An error occurred:", e.args[0]

Sqlite3 - Not require separate server process.

The sqlite3 module was written by Gerhard Häring. To use the module, you must first create a Connection object that represents the database. Here the data will be stored in the example.db file:

import sqlite3
conn = sqlite3.connect('example.db')

You can also supply the special name :memory: to create a database in RAM. Once you have a Connection, you can create a Cursor object and call its execute() method to perform SQL commands:

c = conn.cursor()

# Create table
c.execute('''CREATE TABLE stocks
         (date text, trans text, symbol text, qty real, price real)''')

# Insert a row of data
c.execute("INSERT INTO stocks VALUES ('2006-01-05','BUY','RHAT',100,35.14)")

# Save (commit) the changes
conn.commit()

# We can also close the connection if we are done with it.
# Just be sure any changes have been committed or they will be lost.
conn.close()