UPDATE对任何数据库的操作意味着更新一个或多个记录,这些记录已在数据库中可用。
以下过程更新所有SEX为'M'的记录。在这里,我们将所有男性的年龄提高了一年。
#!/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 UPDATE required records sql = "UPDATE EMPLOYEE SET AGE = AGE + 1 WHERE SEX = '%c'" % ('M') 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()