MySql Select Query - WHERE句からエラーを取得する

Question

私はMySQLで初めてです。

SELECT 
    receive_item.RECEIPT_ID, 
    receive_item.ITEM_ID, 
    (receive_item.QTY - delivery_item.QTY) AS QtyRemained 
FROM receive_item 
INNER JOIN delivery_item 
ON receive_item.ITEM_ID = delivery_item.ITEM_ID 
AND receive_item.RECEIPT_ID = delivery_item.RECEIVE_ID 

これは私がQTYRemainedの値がこの

RECEIPT_ID ITEM_ID QTYRemained 
    3   3   1 

のようなものではない0 ある行のみ私を見せたい

RECEIPT_ID ITEM_ID QTYRemained 
    1   1   0 
    2   2   0 
    3   3   1 
    4   4   0 
    5   5   0 

上記のクエリからの結果であり、上記の選択クエリの最後に "From QTYRemained！= 0"を追加したときにエラーが発生しました。 誰かがなぜ動作していないのか教えていただけますか？

Answer 1

私は古いスティック・イン・ザ・泥だとせずにHAVINGを使用することを拒否しているためGROUP BY句、代替ソリューションはこちら

SELECT 
    ri.RECEIPT_ID, 
    ri.ITEM_ID, 
    (ri.QTY - di.QTY) AS QtyRemained 
FROM receive_item ri 
INNER JOIN delivery_item di 
ON ri.ITEM_ID = di.ITEM_ID 
AND ri.RECEIPT_ID = di.RECEIVE_ID 
WHERE ri.QTY > di.QTY 

かなり簡単です

Answer 2

は非常に

SELECT 
    receive_item.RECEIPT_ID, 
    receive_item.ITEM_ID, 
    (receive_item.QTY - delivery_item.QTY) AS QtyRemained 
FROM receive_item 
INNER JOIN delivery_item 
ON receive_item.ITEM_ID = delivery_item.ITEM_ID 
AND receive_item.RECEIPT_ID = delivery_item.RECEIVE_ID 
WHERE QtyRemained > 0 

Answer 3

利用having代わりのwhere ...そう

WHERE QtyRemained > 0 

を末尾に追加します。

SELECT 
    receive_item.RECEIPT_ID, 
    receive_item.ITEM_ID, 
    (receive_item.QTY - delivery_item.QTY) AS QtyRemained 
FROM receive_item 
INNER JOIN delivery_item 
ON receive_item.ITEM_ID = delivery_item.ITEM_ID 
AND receive_item.RECEIPT_ID = delivery_item.RECEIVE_ID 
having QtyRemained > 0 

か、以下のように行うことができます。

SELECT 
    receive_item.RECEIPT_ID, 
    receive_item.ITEM_ID, 
    (receive_item.QTY - delivery_item.QTY) AS QtyRemained 
FROM receive_item 
INNER JOIN delivery_item 
ON receive_item.ITEM_ID = delivery_item.ITEM_ID 
AND receive_item.RECEIPT_ID = delivery_item.RECEIVE_ID 
where (receive_item.QTY - delivery_item.QTY) > 0 

Answer 4

試してください： -

SELECT 
    receive_item.RECEIPT_ID, 
    receive_item.ITEM_ID, 
    (receive_item.QTY - delivery_item.QTY) AS QtyRemained 
FROM receive_item 
INNER JOIN delivery_item 
ON receive_item.ITEM_ID = delivery_item.ITEM_ID 
AND receive_item.RECEIPT_ID = delivery_item.RECEIVE_ID 
group by receive_item.RECEIPT_ID 
Having QtyRemained > 0