Python操作MySQL資料庫

詳細可參考 windows下mysql安裝流程，8.0以上版本root密碼報錯及修改

python想要操作mysql，必須要有乙個中介軟體，或者叫做驅動程式，驅動程式有很多，mysqlclient、mysqldb、pymysql。我選擇用pymysql，安裝命令：pip install pymysql

import pymysql

db = pymysql.connect(
host="127.0.0.1",
user='root',
password='123456',
database='pymysql_test',
port=3306
)cursor = db.cursor()
cursor.execute('select 1')
data = cursor.fetchone()
print(data)
db.close()

import pymysql

db = pymysql.connect(
host="127.0.0.1",
user='root',
password='123456',
database='pymysql_test',
port=3306
)cursor = db.cursor()
sql = """
insert into user(id,username,gender,age,password) values(null,'abc',1,18,'111111');
"""cursor.execute(sql)
db.commit()
db.close()

sql = """

insert into user(id,username,gender,age,password) values(null,%s,%s,%s,%s);
"""cursor.execute(sql,('spider',1,20,'222222'))

cursor = db.cursor()

sql = """
select * from user
"""cursor.execute(sql)
while true:
result = cursor.fetchone()
if not result:
break
print(result)
db.close()

cursor = db.cursor()

sql = """
select * from user
"""cursor.execute(sql)
results = cursor.fetchall()
for result in results:
print(result)
db.close()

cursor = db.cursor()

sql = """
select * from user
"""cursor.execute(sql)
results = cursor.fetchmany(1)
for result in results:
print(result)
db.close()

cursor = db.cursor()

sql = """
delete from user where id=1
"""cursor.execute(sql)
db.commit()
db.close()

conn = pymysql.connect(

host="127.0.0.1",
user='root',
password='123456',
database='pymysql_test',
port=3306
)sql = """
update user set username='aaa' where id=1
"""cursor.execute(sql)
conn.commit()
conn.close()

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