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newbie - making join queries writable

 
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JS
Guest
PostPosted: Wed Jun 25, 2003 7:23 pm    Post subject: newbie - making join queries writable Reply with quote


As I understand it, not all sql queries can be made writable. If I
have a TDBGrid that displays the results of this query:

select table1.field1, table2.field2 from table1, table2, where
table1.field3=table2.field3

Then the user cannot make changes to the values in those fields.

Am I understanding that correctly? If so, is there an accepted
workaround? All I could think of was to have multiple TQuery objects
on the form with multiple DBEdit fields and keep changing the sql
statements to duplicate a join statement.

Any better ways?

This is with Delphi 5 and odbc access to a mysql database server.

Thanks,
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Sundial Services
Guest
PostPosted: Wed Jun 25, 2003 8:59 pm    Post subject: Re: newbie - making join queries writable Reply with quote


JS wrote:

Quote:
As I understand it, not all sql queries can be made writable. If I
have a TDBGrid that displays the results of this query:

select table1.field1, table2.field2 from table1, table2, where
table1.field3=table2.field3

Then the user cannot make changes to the values in those fields.

Am I understanding that correctly? If so, is there an accepted
workaround? All I could think of was to have multiple TQuery objects
on the form with multiple DBEdit fields and keep changing the sql
statements to duplicate a join statement.


This type of query is not updatable. You can't open a "live query view" on
it.

What you can do, however, and what I'd recommend anyway that you do, is to
run the query, put the results into a local table of some kind {or just
store 'em in memory}, update them there, and then .. if the user presses
"OK" .. execute separate queries to update the actual data.


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Greg Gailer
Guest
PostPosted: Sun Oct 29, 2006 9:01 am    Post subject: Re: Rave Reports Reply with quote


Jean Botes wrote:
Quote:
Hi

What is the most effective way to send data to a report and print it?

I print barcodes but the text is cut of, although it is complete in the
database.

Prints: 'ebenha'
In database reads: 'ebenhaezer vneck'

Any help will be apreciated, thanks
Jean


Hi Jean,

I have set up parameters in my Rave reports (the help file tells you
how) and then pass the values from the delphi program using the:
SetParam('Parameter',String);
function. The parameters are passed as string so you have to convert
them first if they are anything other than that.
I don't know if this is the most effective way but it was simple for me
to use.
Greg
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