Question

如何在sql server中使用多个唯一值更新多个列？

如果我继续下面的方法，需要手动输入1000行...这很难......

以下给出的示例数据:(最多需要更新1000行）

UPDATE buid
    SET Country_Code = CASE Business_Unit_ID
        WHEN 5959 THEN CA
        WHEN 930102 THEN US
        WHEN 3737 THEN CN
        .
        .
        .
        .
        .
        .

    END,
    Country_NAME = CASE Business_Unit_ID
           WHEN 5959 THEN Canada
        WHEN 930102 THEN USA
        WHEN 3737 THEN China
        .
        .
        .
        .
        .
        .
    END
WHERE Business_Unit_ID IN (5959,
930102,
3737
.
.
.
.
.

Answer 1

你需要一张可以加入的桌子，即

import threading
import time


class myThread(object):
    """ 
    The run() method will be started and it will run in the background
    until the application exits.
    """

    def __init__(self, interval=1):
        self.interval = interval
        self.thread_stack = []
        thread = threading.Thread(target=self.run, args=())
        thread.daemon = True                            
        thread.start()                               

    def run(self):
        # Method that runs forever 
        lock = threading.Lock()
        while True:
            if self.thread_stack:
                lock.acquire()
                try: 
                    # if a method is already running on this thread, end it.
                    new_function = thread_stack.pop()
                finally:
                    lock.release()
                # run new function
            else: 
                time.sleep(self.interval)

    def some_function(self):
        #do something
        #do something
        #do something else
        #do one more thing

然后你可以进行连接来更新表格：

Business_Unit(Business_Unit_ID int, Country_NAME varchar(50), Country_Code varchar(2))

如何在sql server中使用多个唯一值更新多个列？

1 个答案: