16 Jun
2014
16 Jun
'14
6:59 p.m.
Hugues Peccatte a écrit :
2014-06-13 19:00 GMT+02:00 Ashutosh Dhundhara
<ashutoshdhundhara(a)yahoo.com>om>:
Thanks Hugues. In the "simulate query" subtask [0] for this student, one
of the feature requests is [1] which involves rolling back (but thanks
for the mention of AUTOCOMMIT=0). But this is only for transactional
storage engines.
Another aspect of this subtask is [2] which involves a simulation via
SELECT.
[0]
https://wiki.phpmyadmin.net/pma/GSoC_2014_Ideas_List#Interface_improvements
[1] http://sourceforge.net/p/phpmyadmin/feature-requests/869/
[2] http://sourceforge.net/p/phpmyadmin/feature-requests/861/
--
Marc Delisle (phpMyAdmin)
Hi,
I was working on RFE #861
<https://sourceforge.net/p/phpmyadmin/feature-requests/861/> (Simulate
UPDATE query).
Lets say I have two tables:
`table_1`
+----+----------+
| id | value |
+----+----------+
| 10 | value_10 |
| 20 | value_20 |
+----+----------+
`table_2`
+----+----------+
| id | value |
+----+----------+
| 10 | value_10 |
| 20 | value_20 |
+----+----------+
UPDATE Query: UPDATE table_1, table_2 SET table_1.value = 'NEW_VALUE',
table_2.value='NEW_VALUE' WHERE table_1.id > 10 AND table_2.id > 10;
This will affect 2 rows.
How to simulate this query using SELECT statement?
I was trying:
SELECT DISTINCT table_1.value, table_2.value FROM table_1, table_2 WHERE
table_1.value <> 'NEW_VALUE' AND table_2.value <> 'NEW_VAUE'
AND
table_1.id > 10 AND table_2.id > 10;
but this only returns 1 row.
Can this be done in a single query only?
Regards,
Ashutosh Dhundhara
Hi,
Isn't it possible to run the query with
set AUTOCOMMIT=0;
and a rollback at the end?
Hugues.