Instead of COALESCE(a.addressid,0) AS addressexists , use CASE : CASE WHEN a.addressid IS NOT NULL THEN 1 ELSE 0 END AS addressexists. ... <看更多>
Search
Search
Instead of COALESCE(a.addressid,0) AS addressexists , use CASE : CASE WHEN a.addressid IS NOT NULL THEN 1 ELSE 0 END AS addressexists. ... <看更多>
NULL 值是在新增資料時沒有設定欄位值,資料庫管理系統便設定該欄位的內容 ... 比較都是NULL IFNULL() 函數IFNULL(expr1, expr2)expr1不是NULL,則回傳. ... <看更多>
SELECT GREATEST ( IFNULL(tableb.create_time,FROM_UNIXTIME(18000)), IFNULL(tablea.create_time,FROM_UNIXTIME(18000)) );. ... <看更多>
... <看更多>
sytolk commented on Nov 30, 2015. Thanks Lukas If I use DSL.nvl function with MySQL what SQL will be generated IFNULL ... ... <看更多>