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USGuan Yang
 

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    1. This table or related slice is empty.
    1. COThe `insert into ... select` form says "run this select query, then insert all the rows into the table". Of course the number of columns returned by your query has to match the number of columns you put in `values(...)`. You could try to run the select part alone to understand. In the query part, I get all the rows from `source_lu` with a matching `stringkeys`, but then use `group by` to only get the unique IDs. So I am grabbing the IDs from `source_lu`. I’ve updated the code to match your example. I am assuming that the column in source_lu is called `id`, otherwise you can change that.
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    2. COIn terms of low level tools, the problem is that you can try to connect directly to the serial port, but most likely it’s not programmed to respond to you. You could try to see if avrdude will talk to it directly: `/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avrdude -p m328p -b 115200 -c arduino -P /dev/cu.usbmodemfd121 -v` (assuming you installed Arduino in `/Applications` as usual). That should report the device signature and might give you more information if something is wrong. If that command succeeds, there is something weird wrong with the Arduino GUI.
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    3. CODid you check the obvious things, like selecting the correct board and serial port in the Tools menu?
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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