【示例】创建数据库

import pymysql


# 链接数据库
con = pymysql.connect(host='localhost',port=3306,user='root',passwd='root',charset='utf8')
# 获取一个和数据库交互的工具cursor
coursor = con.cursor()
# 编写SQL
sql = '''
CREATE DATABASE sxt
   DEFAULT CHARACTER SET = 'utf8mb4';
'''
# 执行SQL
coursor.execute(sql)
# 关闭cursor
coursor.close()
# 关闭链接
con.close()

def add_one():
  # 链接数据库
  con = pymysql.connect(host='localhost',port=3306,user='root',passwd='root',db='sxt',charset='utf8')
  # 获取操作数据的对象 cursor
  cursor = con.cursor()
  # 编写SQL-DML
  # sql = "INSERT INTO t_user VALUES (0,'貂的蝉',18,'女');"
  sql = "INSERT INTO t_user VALUES (0,%s,%s,%s);"
  args = ('刘备',22,'男')
  # 执行SQL
  cursor.execute(sql,args)
  # 提交事务
  con.commit()
  # 关闭Cursor
  cursor.close()
  # 关闭链接
  con.close()

#导入模块
import pymysql
#创建连接
con = pymysql.connect(host='localhost',user='root',password='root',db='db_test',
charset='utf8')      
#创建游标对象cursor
cursor=con.cursor()
sql='select * from t_user'
#执行sql
cursor.execute(sql)
#获取结果集
# result = cursor.fetchall()
# result = cursor.fetchmany(2)
result = cursor.fetchone()
print(result)
# print(cursor.rowcount)