拆分一列為2列mysql表

Question

我在 mysql 表中有此列：

LOT_LOCATION
SGBAKE.0013
SGHAST.0008Z1
SGHAST.0011ZU

如何拆分到此表[設法做到這一點，但 DK 如何更改表本身]：

LOT_LOCATION, Zone Attribute
SGBAKE.0013, ''
SGHAST.0008, Z1
SGHAST.0011, ZU

任何幫助表示感謝謝謝！

我的代碼只有 select 2 列，但沒有改變表格，我不知道如何在創建和改變列時設置條件：

select if(locate('Z',LOT_LOCATION)=0,LOT_LOCATION,substring_index(LOT_LOCATION, 'Z', 1)), 
       if(locate('Z',LOT_LOCATION)=0,'',substring_index(LOT_LOCATION, 'Z', -1)) 
            As Zone_Attribute 
from skynet_msa.Lab_WIP_History;

我嘗試了這個 UPDATE 但區域屬性列值突然消失了

UPDATE Lab_WIP_History
    SET LOT_LOCATION = if(locate('Z',LOT_LOCATION)=0,LOT_LOCATION,substring_index(LOT_LOCATION, 'Z', 1)), 
    `Zone Attribute` = if(locate('Z',LOT_LOCATION)=0,'',substring_index(LOT_LOCATION, 'Z', -1))

Answer 1

lot_location 在 zone_attribute 之前更新 - 即 zone_attribute 測試在 lot_location 中找不到 z 順便說一句，您的 select 查詢不會產生您聲稱的結果

反轉 set 語句的順序

UPDATE Lab_WIP_History
    SET `Zone Attribute` = if(locate('Z',LOT_LOCATION)=0,'',substring_index(LOT_LOCATION, 'Z', -1)), 
     LOT_LOCATION = if(locate('Z',LOT_LOCATION)=0,LOT_LOCATION,substring_index(LOT_LOCATION, 'Z', 1))
;