On 06/07/2017 16:04, Paul Sanderson wrote:
The SQLite syntax diagrams are my first point of call when looking at an
error in my code like this.
https://sqlite.org/lang_update.html
"AS" and an alias are clearly not part of the statement.
And that is how (with testing) I eventually worked out that I was on the
wrong track. Thank you, Paul.
Paul
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On 6 July 2017 at 06:03, Keith Medcalf <kmedc...@dessus.com> wrote:
Do you know of any implementation of SQL that accepts an AS clause for the
updated table? I don't think any do.
Some versions have a FROM extension and you CAN specify an alias for the
updated table in that clause, however, as far as I know the update table
cannot be aliased and the "set <column> = ..." the <column> must always be
a column in the updated table and while you may be allowed to "adorn" it in
some implementations, any adornments are ignored (or trigger an error
message if they are not the same as the updated table).
--
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-----Original Message-----
From: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org]
On Behalf Of John McMahon
Sent: Wednesday, 5 July, 2017 21:17
To: SQLite Users
Subject: [sqlite] syntax error near AS
Hi
Wondering if someone else can spot the syntax error in the following
statement. "locns" is an attached database. There are four "AS" terms in
the statement, they all alias tables.
Ok, found it. It seems that an alias for an "UPDATE" table name is not
permitted. Is there a particular reason for this?
I would think it a convenience especially when using long table names
and attached databases.
John
sqlite> UPDATE locns.xxx_last_delivery AS tgt
... > SET
... > tgt.del_date = (
... > SELECT src.last_del_d
... > FROM main.updates AS src
... > WHERE src.custnum = tgt.custnum),
... > tgt.del_qty = (
... > SELECT src.last_del_q
... > FROM main.updates AS src
... > WHERE src.custnum = tgt.custnum)
... > WHERE
... > tgt.custnum = (
... > SELECT src.custnum
... > FROM main.updates AS src
... > WHERE src.last_del_d IS NOT NULL
... > AND src.last_del_d > tgt.del_date)
... > ;
Error: near "AS": syntax error
--
Regards
John McMahon
li...@jspect.fastmail.fm
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--
Regards
John McMahon
j...@jspect.fastmail.com.au
04 2933 4203
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