isDev();

MERGE INTO meber_t T1
USING DUAL ON (T1.user_id='alseom')
WHEN MATCHED THEN
    UPDATE
       SET email='alseom@alseom.co.kr', mobile='016-xxx-xxxx'
WHEN NOT MATCHED THEN
    INSERT (email, mobile)
    VALUES ('alseom@alseom.co.kr', '016-xxx-xxxx')

if(user_id=='alseom')
    update email, mobile
else
    insert email, mobile