sql 語句if函式
阿新 • • 發佈:2019-02-05
SQL語句中的if函式使用,如果滿足一個件條可以賦一個需要的值,方便程式碼判斷 eg:
SELECT *,if(ebay_excludecountrymodel.id is null,'false','true') checked
FROM ebay_exshiplocation e left join ebay_excludecountrymodel
on e.site=ebay_excludecountrymodel.site
and e.id= ebay_excludecountrymodel.excludecountryid
and ebay_excludecountrymodel.site=186 where e.site=186;
SELECT `user`.realname, if(`user`.realname IS NULL , '有值' ,'無') checked
from user LEFT JOIN user_other_info ON `user`.id=user_other_info.id