Python MySQL Select

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chapter

• Python MySQL entry
• Python MySQL create database
• Python MySQL create table
• Python MySQL Insert Table
• Python MySQL Select
• Python MySQL Where
• Python MySQL Order By
• Python MySQL Delete
• Python MySQL drop table
• Python MySQL Update
• Python MySQL Limit
• Python MySQL Join

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Select (SELECT) from the data table

MySQL is selected from the table (SELECT) data, using the "SELECT" statement:

Examples

Selected from the "customers" table (SELECT) all records, and displays the results:

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="你的用户名",
  passwd="你的密码",
  database="mydatabase"
)

mycursor = mydb.cursor()

mycursor.execute("SELECT * FROM customers")

myresult = mycursor.fetchall()

for x in myresult:
  print(x)

Note : We use a fetchall()method, which results from the last executed statement, gets all rows.

Select (SELECT) part of the field

To select part of the field in the table, using the "SELECT field 1, field 2 ..." statement:

Examples

Select nameand addressfields:

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="你的用户名",
  passwd="你的密码",
  database="mydatabase"
)

mycursor = mydb.cursor()

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

myresult = mycursor.fetchall()

for x in myresult:
  print(x)

Using either fetchone () method

If you want to get a row, you can use fetchone()the method.

fetchone()The method returns the result of the first row:

Examples

Just take one line:

import mysql.connector

mydb = mysql.connector.connect(
  host="localhost",
  user="你的用户名",
  passwd="你的密码",
  database="mydatabase"
)

mycursor = mydb.cursor()

mycursor.execute("SELECT * FROM customers")

myresult = mycursor.fetchone()

print(myresult)