Want to do conditional edits on multiple sqlite db

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There is a reference database:
references.db
Its one of the tables contain fields:
NAME(char) C(decimal number)

Data containing databases with identical structure:
a....x.db
b....y.db
c....z.db
.
.

Their one of the tables contain fields:
NAME1(char) NAME2(char) A(integer)

I want to reference and compare C values of NAME1 and NAME2 in every record of the data files, then if C1 > C2, change the value of A by a fixed amount. In which program can I do this operation? Don't have SQLite installed, would prefer a light weight utility that could support the function.

What I have tried:

I tried exploring in sql studio and opening in notepad++ but couldn't think of a way to do it. It has been a while since I last touched sql so would prefer a simple solution.

Posted 28-Dec-17 18:08pm

Member 13598556

Updated 28-Dec-17 22:02pm

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Richard MacCutchan · Answer 1 · 2017-12-28T22:01:00

Solution 1

If it is an SQLite database you can use the SQL command line program sqlite3. See Command Line Shell For SQLite[^].

Posted 28-Dec-17 22:01pm

Richard MacCutchan

Comments

Member 13598556 30-Dec-17 2:07am

Thanks, could you give some outline on how I can go about doing above with the utility.

Richard MacCutchan 30-Dec-17 3:22am

Not really, a I don't know what you need. But since the documentation is already written that is the best place to start.

Member 13598556 2-Jan-18 12:05pm

After spending some time on the sqlite3 utility, I am able to make selection between the tables referencetable and datatable, and output C1 and C2 values separately but it hasn't come of much use in my above objective. Right now I am trying to make selection:
select A from datatable where (here I want to fetch C values corresponding to NAME1 and NAME2 of the current read record, from the referencetable then make a comparison). Using the select command outputs matches for the whole table so I am unable to use it in the brackets, which command can I use to call only the value for the current read record? Eventually I want to update A=A+100 when meeting a condition between C1 and C2.