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Python•Databases in Python

Python MySQL Select From

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Python MySQL Select From

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Select From a Table

To select from a table in MySQL, use the "SELECT" statement:

Example

Select all records from the "customers" table, and display the result:

Formula

import mysql.connector mydb = mysql.connector.connect(

host="localhost", user=" yourusername ", password=" yourpassword ", database="mydatabase" ) mycursor = mydb.cursor()

mycursor.execute("SELECT * FROM customers")

Formula

myresult = mycursor.fetchall()
for x in myresult:
print(x)

Note:

We use the fetchall()

method, which fetches all rows from the last executed statement.

Selecting Columns

To select only some of the columns in a table, use the "SELECT" statement followed by the column name(s):

Example

Select only the name and address columns:

Formula

import mysql.connector mydb = mysql.connector.connect(

host="localhost", user=" yourusername ", password=" yourpassword ", database="mydatabase" )

Formula

mycursor = mydb.cursor()
mycursor.execute("SELECT name, address FROM
customers")

Formula

myresult = mycursor.fetchall()
for x in myresult:
print(x)

Using the fetchone() Method

If you are only interested in one row, you can use the fetchone() method.

The fetchone()

method will return the first row of the result:

Example

Fetch only one row:

Formula

import mysql.connector mydb = mysql.connector.connect(

host="localhost", user=" yourusername ", password=" yourpassword ", database="mydatabase" ) mycursor = mydb.cursor()

mycursor.execute("SELECT * FROM customers")

Formula

myresult = mycursor.fetchone()
print(myresult)

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