mysql 使用
启动服务
sudo systemctl start mysql
pip3 install pymysql
python 操作数据库：
- 定义类
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import pymysql
class MyDb():
def __init__(self, host, user, passwd, db):
self.__db = pymysql.connect(host, user, passwd, db)
self.__cursor = self.__db.cursor()
# 增删改-数据库
def set(self, sql):
try:
self.__cursor.execute(sql)
self.__db.commit()
except Exception as e:
self.__db.rollback()
print('Execute Error: \n {e}')
# 查-数据库
def get(self, sql, fetchone=True):
self.__cursor.execute(sql)
try:
if fetchone == True:
data = self.__cursor.fetchone()
else:
data = self.__cursor.fetchall()
except Exception as e:
print('Execute Error: \n {e}')
data = None
finally:
return data
# 关闭数据库
def close(self):
self.__db.close()
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- 调用
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def example():
## 实例化数据库
### 类参数：host、user、passwd、db
db = MyDb('localhost', 'root', 'zuoy123', 'test')
## 查看版本
get_version_sql = 'SELECT VERSION()'
version = db.get(get_version_sql)
print(f'Database Version: {version}')
## 删除表
delete_table_sql = 'DROP TABLE IF EXISTS employee'
db.set(delete_table_sql)
## 新建表
new_table_sql = 'CREATE TABLE IF NOT EXISTS employee( \
id INT NOT NULL PRIMARY KEY, \
name CHAR(21) NOT NULL, \
age DOUBLE DEFAULT 18)'
db.set(new_table_sql)
## 查找表
get_table_sql = 'SHOW TABLES'
data = db.get(get_table_sql)
if data:
print(data)
## 关闭数据库
db.close()
if __name__ == '__main__':
example()
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常用sql
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DROP TABLE IF EXISTS employee;
CREATE TABLE IF NOT EXISTS employee(id INT);
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以上就是python操作 mysql的步骤的详细内容，更多关于python操作 mysql的资料请关注服务器之家其它相关文章！
原文链接：https://cloud.tencent.com/developer/article/1526845