MySql中order by和union all同時使用

(SELECT * FROM `idents` where PhotoID = 'badc74d6-58bd-4e46-9a48-aefb3487a61d' AND Selected = 'Yes' ORDER BY IdentTime desc LIMIT 1)
UNION ALL
(SELECT * FROM `idents` where PhotoID = 'badc74d6-58bd-4e46-9a48-aefb3487a61d' AND Author = 'devtest'  ORDER BY IdentTime desc limit 1)

兩邊的語句加上括號就能夠了ide

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