所以我有這個： SELECT
MONTH(trans_date) AS Month_Booking,
count(transact_no) AS NumTransactions,
(price * count(transact_no)) AS TotalRevenue
FROM transaction t
JOIN service s ON t.service_n
我執行的查詢結果中沒有空值。下面是我query SELECT
sur.id AS 'Survey ID',
DATE (sur.capture_date) AS 'Date',
sur.sub_division AS 'Sub-Div',
sd.name AS 'Sub-Div Name',
sd.`circle_name` AS 'Circle
我想從一個MYSQL數據庫複製架構到其他MYSQL數據庫。雖然這樣做幾張桌子給人的問題如下 Error Code: 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(
SELECT month(dateofappointment), COUNT(*) 'NumberOfAppointments'
FROM appointment
WHERE YEAR(dateofappointment) = '2016'
GROUP BY MONTH(dateofappointment)
這顯示我所有月份，但十二月不存在，因爲那一年沒有任何約會
我這樣的查詢： SELECT a.id, a.store_id, a.name, a.total_sold, a.updated_at, b.name AS store_name
FROM products a
JOIN stores b ON b.id = a.store_id
JOIN products_categories c ON c.product_id = a.id
WHERE