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如何使用WorkBench将MySQL数据库表一个接一个地反向工程到ERD上(How to reverse engineer MySQL database tables one-by-one onto an ERD using WorkBench)
如何使用WorkBench将MySQL数据库表一个接一个地反向工程到ERD上(How to reverse engineer MySQL database tables one-by-one onto an ERD using WorkBench)
我有一个包含数百个表的数据库，我想使用MySql Workbench的逆向工程功能创建一个ERD 。
但是同时对这些对象进行逆向工程超出了工作台的能力，所以我打算一个接一个地做，我已经知道了这五个相互关联并反向设计成功的表，现在我有他们的ERD 。 但是我想要做的是从我在同一个数据库中看到适合的更多表格，然后通过对这五个表进行逆向工程来生成ERD 。
我知道每次我想在这五个表中添加另一个表时，我可以通过生成一个新的ERD来实现这一点。 但是有没有解决方法，每次我想添加一个我认为与这五个表相关的新表时，我不需要进行逆向工程。
谢谢。
I have a database containing hundreds of tables, and I want to create an ERD out of that using MySql Workbench's reverse engineer feature.
But reverse engineering such amount of objects at once is beyond workbench's capabilities, so I'm planning to do it one-by-one, I already have these five tables that I know are related to each other and reversed engineered it successfully, and now I have an ERD of them. But what I want to do is add more tables as I see fit from the same database onto the generated ERD from reverse engineering those five tables before.
I know I can probably do this by generating a new ERD each time I want to add another table to those five tables. But is there a work-around for this that I don't have to reverse engineer each time I want to add a new table that I thinks is related to those five tables.
Thanks.
原文：
更新时间：2021-12-16 19:12
最满意答案
使用聚合函数时，所有标量字段必须位于
GROUP BY函数中。你错过了这些：
LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEEND所以，正确的查询将是：
SELECT EVENTPLAN.PLANNO, EVENTPLANLINE.LINENO, RESOURCETBL.RESNAME, COUNT(EVENTPLANLINE.NUMBERFLD) AS NUMBEROFRESOURCES, LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEEND FROM EVENTPLAN, RESOURCETBL, EVENTPLANLINE, LOCATION, FACILITY WHERE EVENTPLAN.PLANNO = EVENTPLANLINE.PLANNO AND EVENTPLANLINE.RESNO = RESOURCETBL.RESNO AND EVENTPLANLINE.LOCNO = LOCATION.LOCNO AND FACILITY.FACNO = LOCATION.FACNO AND FACILITY.FACNAME = 'Basketball arena' AND EVENTPLAN.ACTIVITY = 'Operation' AND EVENTPLAN.WORKDATE BETWEEN '1-OCT-13' AND '31-DEC-13' GROUP BY EVENTPLAN.PLANNO, EVENTPLANLINE.LINENO, RESOURCETBL.RESNAME, LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEENDWhen you use an aggregate function ALL scalar fields must be in
GROUP BYfunction.You have missed these:
LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEENDSo, the right query will be:
SELECT EVENTPLAN.PLANNO, EVENTPLANLINE.LINENO, RESOURCETBL.RESNAME, COUNT(EVENTPLANLINE.NUMBERFLD) AS NUMBEROFRESOURCES, LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEEND FROM EVENTPLAN, RESOURCETBL, EVENTPLANLINE, LOCATION, FACILITY WHERE EVENTPLAN.PLANNO = EVENTPLANLINE.PLANNO AND EVENTPLANLINE.RESNO = RESOURCETBL.RESNO AND EVENTPLANLINE.LOCNO = LOCATION.LOCNO AND FACILITY.FACNO = LOCATION.FACNO AND FACILITY.FACNAME = 'Basketball arena' AND EVENTPLAN.ACTIVITY = 'Operation' AND EVENTPLAN.WORKDATE BETWEEN '1-OCT-13' AND '31-DEC-13' GROUP BY EVENTPLAN.PLANNO, EVENTPLANLINE.LINENO, RESOURCETBL.RESNAME, LOCATION.LOCNAME, EVENTPLANLINE.TIMESTART, EVENTPLANLINE.TIMEEND
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