在兩個表中顯示兩個表與一個UNION

Question

我有一個SQL查詢，我必須從兩個不同的表中獲取值（說a1，a2）。出於簡單的原因，它的工作原理，但因爲我有一個UNION在同一個查詢中有一個重要的原因（從表a2中獲取值放置在a1的列值之間），由於這個原因，我的查詢結果變得很奇怪。這是我的查詢和圖像，它顯示了同樣TICKET_ID的重複條目，我想刪除它，怎麼樣？

QUERY

SELECT 
RECEIPTS.DATENEW AS DATE, 
TICKETS.TICKETID AS TICKETID, 
PAYMENTS.PAYMENT AS PAYMENT, 
PAYMENTS.TOTAL AS TOTAL, 
CUSTOMERS.NAME AS NAME, 
ADJUSTMENTS.ADJUSTMENT_REASON AS REASON 
FROM RECEIPTS 
INNER JOIN TICKETS ON RECEIPTS.ID = TICKETS.ID 
INNER JOIN PAYMENTS ON RECEIPTS.ID = PAYMENTS.RECEIPT 
INNER JOIN CUSTOMERS ON TICKETS.CUSTOMER = CUSTOMERS.ID 
RIGHT JOIN ADJUSTMENTS ON ADJUSTMENTS.CUSTOMER_ID = CUSTOMERS.ID 
WHERE 
(PAYMENTS.PAYMENT = 'debt' 
OR PAYMENTS.PAYMENT = 'debtpaid') 
UNION SELECT 
ADJUSTMENTS.DATE AS DATE, 
ADJUSTMENTS.TICKET_NO AS TICKETID, 
ADJUSTMENTS.ADJUSTMENT_TYPE AS PAYMENT, 
ADJUSTMENTS.ADJUSTMENT_AMOUNT * -1 AS TOTAL, 
ADJUSTMENTS.CUSTOMER_NAME AS NAME, 
ADJUSTMENTS.ADJUSTMENT_REASON AS REASON 
FROM ADJUSTMENTS 
ORDER BY NAME ASC, DATE DESC 

，這裏是它的輸出圖像

輸出

Answer 1

最後我想通了，現在查詢變得如下

SELECT 
RECEIPTS.DATENEW AS DATE, 
TICKETS.TICKETID AS TICKETID, 
PAYMENTS.PAYMENT AS PAYMENT, 
PAYMENTS.TOTAL AS TOTAL, 
CUSTOMERS.NAME AS NAME, 
(SELECT ADJUSTMENTS.ADJUSTMENT_REASON FROM ADJUSTMENTS WHERE ADJUSTMENTS.ADJUSTMENT_TYPE != 'adjustment' AND ADJUSTMENTS.ADJUSTMENT_REASON != '') AS REASON 
FROM RECEIPTS 
INNER JOIN TICKETS ON RECEIPTS.ID = TICKETS.ID 
INNER JOIN PAYMENTS ON RECEIPTS.ID = PAYMENTS.RECEIPT 
INNER JOIN CUSTOMERS ON TICKETS.CUSTOMER = CUSTOMERS.ID 
WHERE 
(PAYMENTS.PAYMENT = 'debt' 
OR PAYMENTS.PAYMENT = 'debtpaid') 
UNION SELECT 
ADJUSTMENTS.DATE AS DATE, 
ADJUSTMENTS.TICKET_NO AS TICKETID, 
ADJUSTMENTS.ADJUSTMENT_TYPE AS PAYMENT, 
ADJUSTMENTS.ADJUSTMENT_AMOUNT * -1 AS TOTAL, 
ADJUSTMENTS.CUSTOMER_NAME AS NAME, 
ADJUSTMENTS.ADJUSTMENT_REASON AS REASON 
FROM ADJUSTMENTS 
ORDER BY NAME ASC, DATE DESC 

Answer 2

您可以使用GROUP BY或只是檢查原因列不null

SELECT q.* FROM (

SELECT 
RECEIPTS.DATENEW AS DATE, 
TICKETS.TICKETID AS TICKETID, 
PAYMENTS.PAYMENT AS PAYMENT, 
PAYMENTS.TOTAL AS TOTAL, 
CUSTOMERS.NAME AS NAME, 
ADJUSTMENTS.ADJUSTMENT_REASON AS REASON 
FROM RECEIPTS 
INNER JOIN TICKETS ON RECEIPTS.ID = TICKETS.ID 
INNER JOIN PAYMENTS ON RECEIPTS.ID = PAYMENTS.RECEIPT 
INNER JOIN CUSTOMERS ON TICKETS.CUSTOMER = CUSTOMERS.ID 
RIGHT JOIN ADJUSTMENTS ON ADJUSTMENTS.CUSTOMER_ID = CUSTOMERS.ID 
WHERE 
(PAYMENTS.PAYMENT = 'debt' 
OR PAYMENTS.PAYMENT = 'debtpaid') 
UNION SELECT 
ADJUSTMENTS.DATE AS DATE, 
ADJUSTMENTS.TICKET_NO AS TICKETID, 
ADJUSTMENTS.ADJUSTMENT_TYPE AS PAYMENT, 
ADJUSTMENTS.ADJUSTMENT_AMOUNT * -1 AS TOTAL, 
ADJUSTMENTS.CUSTOMER_NAME AS NAME, 
ADJUSTMENTS.ADJUSTMENT_REASON AS REASON 
FROM ADJUSTMENTS 
ORDER BY NAME ASC, DATE DESC) q GROUP BY q.TICKETID 

OR

ORDER BY NAME ASC, DATE DESC) q GROUP BY q.REASON !='' // q.REASON IS NOT NULL