pycharm操作mysql数据库创建表向表中插入数据操作mysql数据库查询修改删除数据

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1，安装PyMySQL模块

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语法为 pip install PyMySQL
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2，集成环境里面操作MySQL数据库创建表

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# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写创建表的sql
sql = """create table python_student(sno int primary key auto_increment,sname varchar(30) not null,age int(2),score float(3,1))
"""try:# 执行创建表的sqlcur.execute(sql)print("创建表成功")
except Exception as e:print(e)print("创建表失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()


可打开Navicat查看创建完成的表

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3，向创建的表中插入数据

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1，插入单条数据

# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写插入数据的sql
sql = "insert into python_student (sname,age,score) values (%s, %s, %s)"try:# 执行sqlcur.execute(sql, ("小强", 18, 99.5))con.commit()print("插入数据成功")
except Exception as e:print(e)con.rollback()print("插入数据失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()

2，插入多条数据

# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写插入数据的sql
sql = "insert into python_student (sname,age,score) values (%s, %s, %s)"try:# 执行sqlcur.executemany(sql, [("小强", 18, 97.5),("小二", 19, 98.5),("小五", 20, 99.5)])con.commit()print("插入数据成功")
except Exception as e:print(e)con.rollback()print("插入数据失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()

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4，操作mysql数据库查询所有数据

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# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写查询的sql
sql = "select * from python_student"try:# 执行sqlcur.execute(sql)# 处理结果集students = cur.fetchall()for student in students:# print(student)sno = student[0]sname = student[1]age = student[2]score = student[3]print("sno",sno,"sname",sname,"age",age,"score",score)
except Exception as e:print(e)print("查询所有数据失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()

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5，查询mysql数据库的一条数据

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# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写查询的sql
sql = "select * from python_student where sname=&＃39;小二&＃39;"try:# 执行sqlcur.execute(sql)# 处理结果集student = cur.fetchone()print(student)sno = student[0]sname = student[1]age = student[2]score = student[3]print("sno",sno,"sname",sname,"age",age,"score",score)
except Exception as e:print(e)print("查询所有数据失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()

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6，操作mysql数据库修改数据

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# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写修改的sql
sql = &＃39;update python_student set sname=%s where sno=%s&＃39;try:# 执行sqlcur.execute(sql, ("薛宝钗", 1))con.commit()print("修改成功")
except Exception as e:print(e)con.rollback()print("修改失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()


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7，操作mysql数据库删除数据

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# 导入pymysql
import pymysql# 创建连接
con = pymysql.connect(host="localhost", user="root", password="root", database="test", port=3306)# 创建游标对象
cur = con.cursor()# 编写删除的sql
sql = &＃39;delete from python_student where sname=%s&＃39;try:# 执行sqlcur.execute(sql, ("薛宝钗"))con.commit()print("删除成功")
except Exception as e:print(e)con.rollback()print("删除失败")
finally:# 关闭游标连接cur.close()# 关闭数据库连接con.close()