Python 中的数据库插入操作
当想要将记录创建到数据库表中时需要这样做。
示例
以下示例执行 SQL INSERT 语句以创建一个记录到 EMPLOYEE 表中 -
#!/usr/bin/python import MySQLdb # Open database connection db = MySQLdb.connect("localhost","testuser","test123","TESTDB" ) # prepare a cursor object using cursor() method cursor = db.cursor() # Prepare SQL query to INSERT a record into the database. sql = """INSERT INTO EMPLOYEE(FIRST_NAME, LAST_NAME, AGE, SEX, INCOME) VALUES ('Mac', 'Mohan', 20, 'M', 2000)""" try: # Execute the SQL command cursor.execute(sql) # Commit your changes in the database db.commit() except: # Rollback in case there is any error db.rollback() # disconnect from server db.close()
上面的示例可以按如下方式编写以动态地创建 SQL 查询 -
#!/usr/bin/python import MySQLdb # Open database connection db = MySQLdb.connect("localhost","testuser","test123","TESTDB" ) # prepare a cursor object using cursor() method cursor = db.cursor() # Prepare SQL query to INSERT a record into the database. sql = "INSERT INTO EMPLOYEE(FIRST_NAME, \ LAST_NAME, AGE, SEX, INCOME) \ VALUES ('%s', '%s', '%d', '%c', '%d' )" % \ ('Mac', 'Mohan', 20, 'M', 2000) try: # Execute the SQL command cursor.execute(sql) # Commit your changes in the database db.commit() except: # Rollback in case there is any error db.rollback() # disconnect from server db.close()
示例
以下代码段是另一种形式的执行,你可以在其中直接传递参数 -
.................................. user_id = "test123" password = "password" con.execute('insert into Login values("%s", "%s")' % \ (user_id, password)) ..................................
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