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Excel 里删掉一行,数据库为什么不能跟着真删

  • 2026-08-09 17:19:45
Excel 里删掉一行,数据库为什么不能跟着真删

01 / 04

配置表少了一行,下游历史也差点断了

航空公司、业务类型和站点规则最早都维护在 Excel 里。有人删掉一行,通常表示这条配置以后不再使用。

最直接的同步方式,是让数据库也删除对应记录。但这些记录进入维度表后,已经可能被历史事实、价格结果和报表引用。物理删除不仅会破坏关联,也会让我说不清过去为什么曾经采用这条规则。

可如果什么都不做,旧配置仍会出现在当前选择列表里,新的业务又可能继续使用它。

02 / 04

“现在不用”不等于“从未存在”

后来同步时,我把源表里消失的记录标记为非活跃,而不是删除。

它的业务键和数据库键继续保留,历史事实仍然能找到原来的解释;当前查询则默认只读取活跃记录,避免新业务继续选中已经停用的配置。

这条边界很重要:事实表记录发生过什么,当前配置表决定现在允许什么。为了让当前列表干净,不能把历史证据一起清掉。

这里要区分两个身份。Excel 里的代码是业务键,用来判断这次同步看到的是谁;数据库里的维度键一旦被事实表引用,就承担了历史身份。业务键暂时消失,不能让维度键跟着消失,更不能在它回来时随意换一个新的维度键。

03 / 04

被重新填回 Excel 时,原记录可以恢复

配置也可能是误删,或者停用一段时间后重新启用。同步过程再次看到相同业务键时,不应该再插入一个全新的身份,而是把原记录恢复为活跃,并更新时间。

这样历史和现在仍然指向同一个业务对象。否则同一家航空公司仅仅因为被删掉又加回来,就会在仓库里拥有两个互不相认的身份。

系统还要保护“未知”成员。它用于承接暂时无法映射的数据,不能因为源 Excel 里没有对应行就被一起停用。

批量停用前也需要留出审计信号。源文件读错 Sheet、表头变化或一次上传了空文件,都会让系统误以为所有配置同时消失。如果同步不检查数量突降和来源是否完整,一次输入故障就可能把整张维度表标成非活跃。

04 / 04

删除规则也要先回答它属于哪类数据

并不是所有表都适合软删除。临时缓存可以重建,错误导入的数据也可能需要物理清理。但只要一条记录已经成为历史事实的引用,删除动作就必须更谨慎。

我现在看到 Excel 里少了一行,不会马上问数据库该执行哪条 DELETE。先要问的是:它只是当前失效,还是历史也应该被否定?以后重新出现时,还是不是同一个对象?

这几个问题答清楚,才知道该删除、停用,还是保留一个新版本。

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  139. /yingpanguazai/ssd/ssd1/www/h.sjds.net/runtime/temp/ad153693ed39fba6d1bda2fe72512cde.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/h.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.001012s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001578s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000784s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000699s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001207s ]
  6. SELECT * FROM `set` [ RunTime:0.000524s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001634s ]
  8. SELECT * FROM `article` WHERE `id` = 547122 LIMIT 1 [ RunTime:0.001026s ]
  9. UPDATE `article` SET `lasttime` = 1786368045 WHERE `id` = 547122 [ RunTime:0.010802s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000624s ]
  11. SELECT * FROM `article` WHERE `id` < 547122 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001220s ]
  12. SELECT * FROM `article` WHERE `id` > 547122 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000993s ]
  13. SELECT * FROM `article` WHERE `id` < 547122 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001677s ]
  14. SELECT * FROM `article` WHERE `id` < 547122 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001589s ]
  15. SELECT * FROM `article` WHERE `id` < 547122 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001776s ]
0.192093s