mysql temporary table result to identify rows in the table

[ajoo]

Hi all,

Does the statement

"CREATE TEMPORARY TABLE  temptab as  SELECT ... " 

provide some sort of a return value to check the null/number of rows in that table?

Running the same in phpadmin definitely gives the number of rows affected but i don't know how to tap into that value. I tried using the

$stmt->bind_result($count); 

after executing the query thinking it might be the same as the Select query but that returns no value while my table has about 7 rows generated.

If someone can show how, if the value can be retrieved.

Thanks.

 

[Barand]

Have you considered http://php.net/manual/en/mysqli.affected-rows.php

[ajoo]

No sir, I hadn't.

?Thank you Guru Barand !!

Edited January 14, 2019 by ajoo

[ajoo]

SIr,

The following query however fails to give the number of affected rows.

SELECT 
table_A.uid,
table_A.pole,
table_A.act as Status
FROM
table_A

UNION

SELECT
table_B.uid,
table_B.pole,
table_B.confirm_A as status
FROM table_B

UNION

SELECT
table_C.uid,
'User' as pole,
(table_C.confirm_A + table_C.confirm_B) as status
FROM table_C;

There are about 9 rows that are actually formed so I wonder if that is the same as rows affected. Is there a way to find the number of rows formed from the above query ?

Presently I encompass the above query with an additional

SELECT COUNT(uid) FROM
{




}bb;

which provides the rows that are available as 9.

Running the 1st query is faster in this case. I was wondering if I could do without the COUNT(uid) thingy !

Thank you.

 

[benanamen]

Your code smells of a bad database design. How about telling us why you are repeating the same data columns in multiple tables.

[Barand]

There won't be any "affected rows". It is not an update, delete or insert query.

Edited January 19, 2019 by Barand

[ajoo]

Hi Benanamen !

Thanks for the response. Please bear with me for a day or so while I am doing a quick run through of my code. I'll come back and revert shortly.

Meanwhile, here's a link, in case you would like to check out the near same discussion earlier on this topic.

https://forums.phpfreaks.com/topic/301981-query-woes-confused/

Sorry for this delay.

Thanks.

Edited January 21, 2019 by ajoo