檢索基於月日在MySQL

Question

我想請根據所記錄的創建月份年份值：

如果月份是1月起，我應該得到去年 如果月份爲4月起，我應該在今年得到

SELECT IF ((MONTH(Application.created) > 3), (YEAR(Application.created)), (YEAR(Application.created, INTERVAL -1 YEAR))) FROM Table 

Answer 1

你可以只減去1（無需interval）較上年值。另外，我用CASE因爲我在所有的括號:)迷路

SELECT 
    CASE WHEN MONTH(Application.created) > 3 THEN YEAR(Application.created) 
     ELSE YEAR(Application.created) - 1 
    END 
FROM Table 

編輯：

SELECT IF ((MONTH(Application.created) > 3), (YEAR(Application.created)), (YEAR(Application.created) - 1)) FROM Table