Re: AW: Identity column

Booth,

Since you're learning...I have to ask, are you taking care to avoid SQL
Injection?

You should always either use static SQL or if you must use dynamic, then
use parameter markers.

Good (static)
exec sql
update mytbl
set myfld = 'XYZ'
where mykey = :hostvar;

Also good (dynamic with parameter marker)
wSql = "update mytbl
set myfld = 'XYZ'
where mykey = ?";
exec sql
prepare mystm from wSQL;
exec SQL
execute mystm using :hostvar;

Bad (dynamic sql w/o parameter marker)
wSql = "update mytbl
set myfld = 'XYZ'
where mykey = " + hostvar;

Charles




On Tue, Dec 1, 2015 at 11:19 AM, Booth Martin <booth@xxxxxxxxxxxx> wrote:

First of all, thanks to all for the help with this and other SQL issues
you've helped me with as I struggled with reaching the Advanced Novice
stage with SQL.

Secondly, identity_val_local() worked a charm.

Lastly, I have to admit that I am impressed with SQL's ease and strength.
I wrote a 500-line subfile program with 5 columns of data, sortable on any
column by clicking any column heading. Clicking that column again sorts in
the opposite direction. What makes sorting a subfile useful with large
data files is that each column also allows wildcard searches so that
subfile sizes can quickly be sized to 200-300 chosen records.

Here is a carousel of a some screen shots of the program.
http://martinvt.com/SQL_-simple-/SQL_Name_Editor/sql_name_editor.html

On 12/1/2015 8:58 AM, Birgitta Hauser wrote:

For a single row I normally prefer Identity_Val_Local()

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

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