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