Thanks for the reply. I tried what I think you said and can't restore. 
I have 2 databases call them w177.sdb and w166.sdb . 
w177 has 6 years of data from 2016 to Aug 4, 2021, w166.sdb has 1 year of 
data from Sept 2021. 
I want to combine them.
I  did a sqlite3 w166.sdp . dump archive > dum166.sql. 
Tried a sqlite3 w177.sdb < dum166.sql 
         and it sure didn't like that, complained  table archive has 52 
columns but 114 values were supplied & UNIQUE constraint failed: 
archive_day_***** for all of them.
Tried a sqlite3 .restore w177.sdb dum166.sql 
       and that did not work

Any suggestions on what I am doing wrong?

On Monday, September 19, 2022 at 12:44:15 PM UTC-6 vince wrote:

> Dump and restore the archive table and ignore any 'duplicate entry' 
> warnings you might see....
>
> As always work off 'copies' of your databases...
>
> On Monday, September 19, 2022 at 9:33:16 AM UTC-7 [email protected] 
> wrote:
>
>> According to what I am seeing in sqlitebrowser, I have managed to mess up 
>> the database and its backup. It goes from August 4, 2021 to August 2, 2022 
>> with nothing in between. Of course I was not smart enough to save any of 
>> the *.txt files in  the NOAA directory. And my other database backup is 
>> from August 4, 2021 which was in /home/weewx/Documents. Seems strange that 
>> is the date. Oh well. I do have another machine that was reading the exact 
>> same data for that period using a SDR so now all I have to do is somehow 
>> piecemeal the 2 databases to get the data for Aug 4,2021 through Aug 2, 
>> 2022 into the database that has data from 2016.  
>>
>> Any suggestions as how to pick data from one database and put it in the 
>> other database? I assume I will have to use sqlite3.
>>
>> On Thursday, September 15, 2022 at 6:37:46 PM UTC-6 gjr80 wrote:
>>
>>> First thing to do if you are viewing the file(s) via a web browser is to 
>>> clear the browser cache. You can try viewing the files directly via an 
>>> editor or cat'ing them to a console. Second thing to try is forcing WeeWX 
>>> to regenerate all of your NOAA format month and year files. Delete all of 
>>> the month and year files on your WeeWX machine, wait for the next report 
>>> cycle to complete during which WeeWX will regenerate them all. Be patient, 
>>> depending on how much data you have in your database it could take a while. 
>>> Once they have be regenerated have look and see what's there. Again be 
>>> careful of browser caches if viewing via a browser.
>>>
>>> If you still have issues post back here.
>>>
>>> Gary
>>>
>>> On Friday, 16 September 2022 at 09:04:52 UTC+10 [email protected] 
>>> wrote:
>>>
>>>> I stopped weewx, copied the data base weewx.sdb to a backup location 
>>>> and then restarted weewx. When I look at Yearly reports for 2022 I only 
>>>> have data from the month I restarted it (August). But if I look at monthly 
>>>> reports for January through July I have data there. Also when I look at 
>>>> the 
>>>> current data page and select year data there is nothing from 9/1/21 to 
>>>> 8/1/22.  
>>>> Anyway to rebuild that yearly data for 2022?
>>>>
>>>

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