# -*- utf-8 -*-
"""@file:mysql.py
@description:
@author:echohye
@date:2022/01/28 19:46
"""import pymysql
'''@author:echohye
@description:連線資料庫並建立資料庫
@date:2022-01-28, 周五, 19:47
'''def connectdb():
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306)
cursor = db.cursor()
cursor.execute('select version()')
data = cursor.fetchone()
print(f'database version:')
cursor.execute('create database spiders default character set utf8mb4')
db.close()
'''author:echohye
@description:建立表
@date:2022-01-28, 周五, 19:56
'''def createtable():
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306, db='spiders')
cursor = db.cursor()
sql = 'create table if not exists students(id varchar(255) not null,name varchar(255) not null,' \
'age int not null,primary key(id))'
cursor.execute(sql)
db.close()
'''@author:echohye
@description:插入資料
@date:2022-01-28, 周五, 20:22
'''def insertdata():
id = '10003'
user = 'mike'
age = 22
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306, db='spiders')
cursor = db.cursor()
# sql = 'insert into students(id, names, age) values ("%s", "%s", %s)' % (id, user, age)
sql = 'insert into students(id, name, age) values ("'+id+'", "'+user+'", '+str(age)+')'
try:
cursor.execute(sql)
db.commit()
print('插入成功')
except exception as e:
db.rollback()
print(e.args)
print('插入失敗')
finally:
db.close()
'''@author:echohye
@description:更新資料
@date:2022-01-28, 周五, 21:12
'''def updatedata():
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306, db='spiders')
cursor = db.cursor()
# sql = 'update students set age=21 where name="mike"'
sql = "update students set age=19 where name='mike'"
try:
cursor.execute(sql)
db.commit()
print("successful")
except exception as e:
db.rollback()
print(e.args)
print("failure")
finally:
db.close()
'''@author:echohye
@description:刪除資料
@date:2022-01-28, 周五, 21:26
'''def deletedata():
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306, db='spiders')
cursor = db.cursor()
sql = "delete from students where name='mike'"
try:
cursor.execute(sql)
db.commit()
print("successful")
except exception as e:
db.rollback()
print(e.args)
print("failure")
finally:
db.close()
'''@author:echohye
@description:查詢資料
@date:2022-01-28, 周五, 21:27
'''def querydata():
db = pymysql.connect(host='localhost', user='root', password='zhy123', port=3306, db='spiders')
cursor = db.cursor()
sql = "select * from students where age>20"
try:
cursor.execute(sql)
# query = cursor.fetchone()
query = cursor.fetchall()
print("query:" + query.__str__())
except exception as e:
print(e.args)
print("failure")
finally:
db.close()
if __name__ == '__main__':
# connectdb()
# createtable()
# insertdata()
# updatedata()
# deletedata()
querydata()
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