Problem with ADO and queries

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#3366

From: Carlos
Date: Thu, 10 Oct 2002 09:08

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Hi, i have detected several problems when i try to modify a select statement
using ADO components (ADODataSet).

I only have the problem when i want to modify the data not when i open the
select to read the data.

For instance if a have two tables:

Table1 (a, b) : a is key
Table2 (a, b) : a is key

1 : 1 relation between Table2_a -> Table1_a

If a do the next select:

SELECT a.a as a, a.b as b, b.a as c, b.b as d
FROM Tabla1 as a INNER JOIN Tabla2 as b on a.a = b.b

I can read and modify the data, but if i do:

SELECT a.a, a.b, b.a, b.b
FROM Tabla1 as a INNER JOIN Tabla2 as b on a.a = b.b

or

SELECT a.a as a, a.b as b, b.b as d
FROM Tabla1 as a INNER JOIN Tabla2 as b on a.a = b.b

i can read the data but not modify it.

My question is: exist some kind of rules for a select statement to ensure
that i can read and modify the data in it ?

Thanks to all.

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Subject: Problem with ADO and queries
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