Sorry if the following is a duplicate but I've just updated to the latest
version of my email client and it seems to be leaving messages in the
out-basket!
Thank you Simon for your very comprehensive and interesting reply,
especially the SQL examples
> - set MAXIMUM/MINIMUM values.
CREATE TABLE journeys (
start TEXT,
destination TEXT,
distance REAL,
CHECK (distance BETWEEN 0.0 AND 5000.0),
CHECK (start != destination))
> - allow me to force UPPER case.
CREATE TABLE airports (
designation TEXT,
fullName TEXT,
city TEXT,
country TEXT,
CHECK (designation == UPPER(designation)),
CHECK (fullName NOT NULL),
CHECK (designation != ''))
both of which will be extremely useful. But as I said in my last post I
got confused between Visual FoxPto SQL and Visual FoxPro built in
programming language. I could certainly achieve what I want by using a
spreadsheet, such as LibreOffice Calc, to create a validated and extended
temporary file which I could then use to import the relevant validated
fields to my "Order items" table in my SQLite database; but this seems to
be a rather long-winded and circuitous approach.
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