SELECT i_logon, i_partno, sum(i_qty) AS i_qty FROM requirements_table, inventory_table
WHERE requirements_table.l_partn
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Question
MySQL: GROUP BY multiple fields
I have a query (in MySQL):
SELECT l_partno, l_qty, i_login, FROM requirements_table, inventory_table
WHERE requirements_table.l_partn
Now, it is possible that one member (i.e. for one value of the login field) may have multiple entries for the same part number.
e.g.
i_login i_partno i_qty
john a123 107
john a123 63
paul a123 105
bob b456 11
bob a123 13
paul b456 442
I need to get the total quantity of each part for each member.
i.e.
john a123 170 (sum of 107 and 63)
paul a123 105
bob b456 11
bob a123 13
paul b456 442
I believe this is possible with SUM(i_qty) and GROUP BY, but I'm having trouble getting it to produce the correct results.
How should I alter the query to do this?
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by: rockmansatticPosted on 2004-06-09 at 07:42:10ID: 11270347
You may not have to use GROUP BY, possibly just SUM(i_qty) where i_login = something. and then haev this repeat for each login.
It could fairly easily be done using applicaton logic, this may be a second option to your pure sql code answer. You can have it added up on the page.
Ill see if I can get some code, someone may have a better quicker way.
Rockman