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SQL copy record

Posted on 2001-07-04
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Last Modified: 2011-09-20
I'm not that familar with databases so this question may be impossible to solve or sound stupid to you, but I hope you understand it :)

I have selected a record in a TQuery and wants to insert this record into another table in another database.

The function should be generic and handle all kinds of datatypes: VarChar, Timestamp, Blob etc.

I was told not to use BDE if it's possible, that means I can't use TBatchMove, isn't that correct?

The way I thought of is to have two TQueries, One to select the record another on to do the insertion, with this SQL code:
INSERT INTO :TABLE VALUES(:VALUES)

I would then fill out the params, but how does I fill out VALUES. When I can get a lot of different types it isn't just to loop through, like this (may have errors, but you should get my point)
for i:=0 to Query1.FieldCount-1 do
  Values := Values+'"'+Query1.Fields[i]+'";'

What to do?
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Question by:sorentop
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18 Comments
 

Expert Comment

by:didil
ID: 6254005
hi there,
    maybe you're correct about the code, but you have to know the datatype. string type have to use ' .
but how about blob type ? is anyone know ?

hmm...
   how about if you define 2 tables, than you read the table1 to eof then you put each record into table2.

Table1.TableName := TableSourceName;
Table2.TableName := TableDestinationName;

While Not Table1.Eof do
Begin
   Table2.Insert;
   For i := 0 to Table1.FieldCount -1 do
      Table2.Field[i] := Table1.Field[i];
   Table2.Post;
   Table1.Next;
End;

But i don't know it use BDE or not ?

hope it's helpful
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Expert Comment

by:kretzschmar
ID: 6254256
why not use the bde (didnt have any problem with this) like

query1.sql.text := 'select * from atable';
query1.open;
table1.batchmove(query1,batcopy);  //will create a table, you will have to set first the databasename and tablename (table must not exist)
query1.colse

you could use also a other select like

insert into ADestTable select * from ASourcetable

in this case the ADestTable must exist first

meikl ;-)
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Author Comment

by:sorentop
ID: 6254707
insert into ADestTable select * from ASourcetable
You can't just that, because the two tables are in different databases
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Expert Comment

by:kretzschmar
ID: 6254726
yup, the tables must have the same structure of course, by doing this,
but by different structure then you can do this

insert into ADestTable (FieldList) select FieldList from ASourcetabe

whereas fieldlist is

FieldName1, FieldName2, ...,

which must not identical by name for desttabe and sourcetable, just only the typ must match

meikl ;-)
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Expert Comment

by:kretzschmar
ID: 6254732
about different databases you never said this before

insert into ::aliasname1::adesttable (fieldlist) select fieldlist ::aliasname2::asourcetable

meikl ;-)
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Expert Comment

by:kretzschmar
ID: 6254737
oops, from missed on my last comment

insert into ::aliasname1::adesttable (fieldlist) select fieldlist from ::aliasname2::asourcetable

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Author Comment

by:sorentop
ID: 6254766
Read my third line, I think it says so.

The tables have 100% the same structure, same fieldname and type.

What does the double colon's mean? Should they mean a param with : around it. TQuery says there aren't any params in the SQL statement.
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Expert Comment

by:kretzschmar
ID: 6254789
well you're right overlooked this ;-)

:: shows the bde that an aliasname follows,

you can also use double quotes like

"aliasname.tablename"

meikl ;-)
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Expert Comment

by:kretzschmar
ID: 6254794
as it the same structure, you could use

insert into ::aliasname1::adesttable select * from ::aliasname2::asourcetable

you can also append a wherecondition like

insert into ::aliasname1::adesttable select * from ::aliasname2::asourcetable where condition

whereas the where is pointed to asourcetable

meikl ;-)

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Expert Comment

by:kretzschmar
ID: 6258441
any results? applyable? problems?
0
 

Author Comment

by:sorentop
ID: 6262566
If I enter this into a Query I get an error saying that it can't find the table

insert into "Alias1.TableName"
select * from "Alias2.TableName"
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Expert Comment

by:kretzschmar
ID: 6264618
? try the :: syntax
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Author Comment

by:sorentop
ID: 6264654
have done give's me the same error
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Expert Comment

by:kretzschmar
ID: 6265096
did the table on both sides exists?
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Author Comment

by:sorentop
ID: 6266262
yes of course :)
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Expert Comment

by:kretzschmar
ID: 6266432
? hmm, it works for me

which database do you use?
(i've tested it with paradox->interbase and vice versa)

meikl ;-)
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Author Comment

by:sorentop
ID: 6267059
interbase
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Accepted Solution

by:
kretzschmar earned 450 total points
ID: 6280267
works fine to me too
interbase<->interbase

(don't use a databasename in the query)
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