SQL声明选择插入[关闭]

Question

我正在尝试让此查询在选择的所有结果上运行。
但问题是 select from LOG_ITEM201303 只返回一个结果。
因此，这意味着每次运行此脚本时，INSERT INTO 子句只会影响一行。
但我想要做的是获取所有结果（总共 600 多个）并逐行插入所有结果。

DECLARE @charkey int, @charname varchar(16), @item int

SELECT @charkey = CHAR_KEY, @charname = NAME, @item = ITEMNUM
FROM LOG_ITEM201303
where 
(   
    ITEMNUM = 14317
OR  ITEMNUM = 14318
OR  ITEMNUM = 15478
OR  ITEMNUM = 15479
OR  ITEMNUM = 14301
OR  ITEMNUM = 14302
OR  ITEMNUM = 15476
OR  ITEMNUM = 15477
OR  ITEMNUM = 15018
OR  ITEMNUM = 15019
OR  ITEMNUM = 15020
OR  ITEMNUM = 15021
OR  ITEMNUM = 15022
OR  ITEMNUM = 15023
OR  ITEMNUM = 15024
OR  ITEMNUM = 15025
OR  ITEMNUM = 14437
OR  ITEMNUM = 14438
OR  ITEMNUM = 15656
OR  ITEMNUM = 15657
OR  ITEMNUM = 15658
OR  ITEMNUM = 15659
OR  ITEMNUM = 15660
OR  ITEMNUM = 15661
OR  ITEMNUM = 15662
OR  ITEMNUM = 15663
) AND (KIND = 133) AND (Convert(varchar, OCCUR_TIME,111) < '2013/03/22')

SELECT @charkey, @charname, @item

INSERT INTO game.dbo.Mail_Item_Table
(ItemNumber, ItemInfo, ReceiveDate)
VALUES
(@item, (SELECT CONVERT(BINARY(16), REVERSE(CONVERT(BINARY(16), @item)))), NULL)

INSERT INTO game.dbo.Mail_Message_Table
(Message)
VALUES
('Automated Message from the ADMIN.')

INSERT INTO game.dbo.Mail_List_Table
(ReceiverCharKey, MailListIndex, MailItemIndex, MailMessageIndex, Sender, Receiver, SendDate)
VALUES 
(@charkey,
(SELECT TOP 1   MailListIndex+1 as last_entry
 FROM           game.dbo.Mail_List_Table
 WHERE          sender = 'SEND0R'
 ORDER BY MailListIndex DESC),
(SELECT TOP 1   MailItemIndex AS last_entry
 FROM           game.dbo.Mail_Item_Table
 ORDER BY       MailItemIndex DESC),
(SELECT TOP 1   MailMessageIndex AS last_entry
 FROM           game.dbo.Mail_Message_Table
 ORDER BY       MailMessageIndex DESC),
 'SEND0R', '@charname', getdate())

Answer 1

主要问题是您选择单个变量 - 仅适用于单行 - 因为每个变量只能保存一个值。另外：对于一般的 SQL，您应该避免“逐行”（也称为 RBAR - row-by-agonizing-row em>) 方法 - 这只是一个糟糕的设计，并且会扼杀您从基于集合的方法中获得的任何性能。尽可能避免它！

您需要做的是将数据直接从SELECT 插入到目标表中 - 不使用中间的任何变量...或者如果您需要使用相同的数据进行多次插入（看起来就像这里的情况一样），您需要将初始 SELECT 的结果存储在 表变量 中（不是每行的单个变量）

所以试试这样的：

-- define a table variable to hold the data
DECLARE @TemporaryData TABLE (charkey int, charname varchar(16), item int)

-- initial SELECT - insert data into table variable    
INSERT INTO @TemporaryData(charkey, charname, item)
   SELECT CHAR_KEY, NAME, ITEMNUM
   FROM LOG_ITEM201303
   WHERE ( ..... ) 

-- insert data from the table variable into the first table    
INSERT INTO game.dbo.Mail_Item_Table(ItemNumber, ItemInfo, ReceiveDate)
   SELECT 
       item, 
       CONVERT(BINARY(16), REVERSE(CONVERT(BINARY(16), item)))), 
       NULL
   FROM @TemporaryData

-- unrelated to the table variable ...    
INSERT INTO game.dbo.Mail_Message_Table(Message)
VALUES('Automated Message from the ADMIN.')

-- insert data from table variable into yet another table...    
INSERT INTO game.dbo.Mail_List_Table(ReceiverCharKey, MailListIndex, MailItemIndex, MailMessageIndex, Sender, Receiver, SendDate)
  SELECT
      charkey,
     (SELECT TOP 1 MailListIndex+1 as last_entry
      FROM game.dbo.Mail_List_Table
      WHERE sender = 'SEND0R'
      ORDER BY MailListIndex DESC),
     (SELECT TOP 1 MailItemIndex AS last_entry
      FROM game.dbo.Mail_Item_Table
      ORDER BY MailItemIndex DESC),
     (SELECT TOP 1 MailMessageIndex AS last_entry
      FROM game.dbo.Mail_Message_Table
      ORDER BY MailMessageIndex DESC),
     'SEND0R', 
     charname, 
     getdate()
   FROM @TemporaryData