MySQL's pymysql operation

PyMysql is a MySQL client library implemented in pure Python, which supports compatibility with Python3 and is used to replace MySQLdb

query operation

Write in advance to prepare the corresponding tables and data in mysql

CREATE DATABASE IF NOT EXISTS mydb17_pymysql;

USE mydb17_pymysql;

CREATE TABLE IF NOT EXISTS student(
	sid INT PRIMARY KEY auto_increment,
	sname VARCHAR(20),
	age INT
);

INSERT INTO student VALUES(NULL,'宋江',30),(NULL,'武松',28),(NULL,'林冲',26);

Inquire

import pymysql

# 获取mysql连接
conn = pymysql.connect(host='localhost', port=3306, user='root', password=, database='mydb17_pymysql')

# 获取游标
cursor = conn.cursor()

# 执行SQL语句 返回值就是SQL语句在执行过程中影响的行数

sql = "select * from student;"

row_count = cursor.execute(sql)
print("SQL语句执行影响的行数%d"%row_count)

# 取出结果集中一行，返回的结果是一行
# print(cursor.fetchone())

# 取出结果集中的所有数据，返回一行数据
for line in cursor.fetchall():
    print(line)

# 关闭游标
cursor.close()

CRUD operation

import pymysql

# 获取mysql连接
conn = pymysql.connect(host='localhost', port=3306, user='root', password=, database='mydb17_pymysql')

# 获取游标
cursor = conn.cursor()

# 执行SQL语句 返回值就是SQL语句在执行过程中影响的行数

sql = "select * from student;"

row_count = cursor.execute(sql)
print("SQL语句执行影响的行数%d"%row_count)

# 取出结果集中一行，返回的结果是一行
# print(cursor.fetchone())

# 取出结果集中的所有数据，返回一行数据
for line in cursor.fetchall():
    print(line)

# 关闭游标
cursor.close()