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import pymysql
# 创建mysql连接（ ）
conn = pymysql . connect ( user = " root " , password = " cyh0110 " , database = " SCT " , host = " 127.0.0.1 " , port = 3306 )
cursor = conn . cursor ( ) # 游标的定义、打开
# 字符串型SQL语句的执行
SQLString = " INSERT INTO student VALUES ( ' 20220001 ' , ' 张三 ' , ' 男 ' , 20, ' 01 ' ) "
cursor . execute ( SQLString )
SQLString = " INSERT INTO course VALUES ( ' 1001 ' , ' 数据库 ' , 3, 48, ' T01 ' ) "
cursor . execute ( SQLString )
SQLString = " INSERT INTO sc VALUES ( ' 20230001 ' , ' 1001 ' , 85) "
cursor . execute ( SQLString )
conn . commit ( )
def query_data ( table_name ) :
"""
游标数据的读写处理，读写游标数据
:param table_name: 表名称
:return: 游标数据
"""
SQLString = f " SELECT * FROM { table_name } "
cursor . execute ( SQLString ) # 执行查询sql语句
data = cursor . fetchall ( ) # 获取游标中的数据
return data
StudentList = query_data ( " student " )
CourseList = query_data ( " course " )
SCList = query_data ( " sc " )
# 关闭数据库连接
cursor . close ( )
conn . close ( )
