Question

I have this problem regarding sql which i will be using in a webservice if I can get this right. What I wanted to do is create a summary report of a transaction. The transaction have header and lines. In a transaction, we are going to input a many planks.

After the inputing, I would like to produce a report that would add all the plank that belongs to a category, then multiply all the planks by the price of that supplier so that I can have the total amount. Here is a pic:

below is my sql which produce wrong output:

select
      t1.transaction_num,
      wo1.wood_classification_desc,
      wo2.wood_specie_desc,
      sum(t2.board_foot) as total_board_foot,
      su1.price,
      sum(t2.board_foot*su1.price) as total_amount
    from
      "transaction_hdr" t1
      left join "transaction_lne" t2 on (t1.transaction_id = t2.transaction_id)
      left join "supplier" su2 on (t1.supplier_id = su2.supplier_id)
      left join "supplier_price" su1 on (t2.price = su1.price)
      left join "wood_classification" wo1 on (t2.wood_classification_id = wo1.wood_classification_id)
      left join "wood_specie" wo2 on (wo1.wood_specie_id = wo2.wood_specie_id)
    group by
      t1.transaction_num,wo1.wood_classification_desc,su1.price,su2.supplier_name,wo2.wood_specie_desc
    order by transaction_num,wo2.wood_specie_desc

Evrytime I run that sql, it produces somthing like this:

the transaction that i test only have five planks. 4 planks under Mahogany 6" wider - 7ft. up and 1 Mahogany 5" wider - 7ft. up.

Answer 1

Do you have more than one record in supplier_price with price = 13.33 ? That would be my guess, as all the other joins appear to be on primary keys..

EDIT:

Your problem is that you’re joining to supplier_price on the price field, which is not a valid key. Given that your output doesn’t take anything from the supplier_price table, I’d be inclined to remove it from the query altogether as below:

select
      t1.transaction_num,
      wo1.wood_classification_desc,
      wo2.wood_specie_desc,
      sum(t2.board_foot) as total_board_foot,
      t2.price,
      sum(t2.board_foot*t2.price) as total_amount
    from
      "transaction_hdr" t1
      left join "transaction_lne" t2 on (t1.transaction_id = t2.transaction_id)
      left join "supplier" su2 on (t1.supplier_id = su2.supplier_id)
      left join "wood_classification" wo1 on (t2.wood_classification_id = wo1.wood_classification_id)
      left join "wood_specie" wo2 on (wo1.wood_specie_id = wo2.wood_specie_id)
    group by
      t1.transaction_num,wo1.wood_classification_desc,t2.price,su2.supplier_name,wo2.wood_specie_desc
    order by transaction_num,wo2.wood_specie_desc