我知道如果它是一次性條件如何使其工作。我如何使它適用於多種條件?對於多個像這樣的SQL選擇計數
SELECT count(TableName.DeviceName where DeviceName like 'AR%') as DEVICE_Type_A,
count(TableName.DeviceName where DeviceName like 'R%') as DEVICE_Type_B,
count(TableName.DeviceName where DeviceName like 'P%') as DEVICE_Type_C,
count(TableName.DeviceName where DeviceName like 'AM%') as DEVICE_Type_D,
FROM DB.TableName TableName
WHERE TableName.DURATIONMIN > '180'
什麼是你的問題? – Jesse 2012-07-09 18:31:40
那麼,你的問題確實沒有詳細說明你想要達到的目標? – rvphx 2012-07-09 18:32:35