Flash cards
Review the key moves
What is the main idea behind Python MySQL Select From?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
Which statement best captures the main point of this lesson?
Complete the missing token from the example code.
___ mysql.connectorPut the learning moves in the order that makes the concept easiest to apply.
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:
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="
yourusername
",
password="
yourpassword
",
database="mydatabase"
)
mycursor =
mydb.cursor()
mycursor.execute("SELECT * FROM customers")
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:
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="
yourusername
",
password="
yourpassword
",
database="mydatabase"
)
mycursor = mydb.cursor()
mycursor.execute("SELECT name,
address FROM
customers")
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:
Fetch only one row
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="
yourusername
",
password="
yourpassword
",
database="mydatabase"
)
mycursor =
mydb.cursor()
mycursor.execute("SELECT * FROM customers")
myresult = mycursor.fetchone()
print(myresult)