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Update gnucash-sql section of README.

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Chris Berkhout 2021-08-24 16:52:38 +02:00
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README.md
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@ -153,10 +153,18 @@ pricehist fetch ecb EUR/AUD -s 2021-01-01 -o gnucash-sql | psql -U username -d d
Beware that the GnuCash project itself does not support integration at the
database level, so there is a risk that the SQL generated by `pricehist` will
be ineffective or even damaging for some version of GnuCash.
be ineffective or even damaging for some version of GnuCash. In practice, this
strategy has been used successfully by other projects. Reading the SQL and
keeping regular database backups is recommended.
In practice, this strategy has been used successfully by other projects.
Reading the SQL and keeping regular database backups is recommended.
The GnuCash database must already contain commodities with mnemonics matching
the base and quote of new prices, otherwise the SQL will fail without making
changes.
Each price entry is given a GUID based on its content (date, base, quote,
source, type and amount) and existing GUIDs are skipped in the final insert, so
you can apply identical or overlapping SQL files multiple times without
creating duplicate entries in the database.
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