Mariadb 具有内部联接的MySQL查询语法错误
我有以下疑问:Mariadb 具有内部联接的MySQL查询语法错误,mariadb,Mariadb,我有以下疑问: ( SELECT * FROM salon_promo tt INNER JOIN (SELECT salon_id, MAX(promo_id) AS MaxDateTime FROM salon_promo GROUP BY salon_id) groupedtt ON tt.salon_id = groupedtt.salon_id AND tt.promo_id = groupedtt.Max
(
SELECT * FROM salon_promo tt
INNER JOIN
(SELECT salon_id, MAX(promo_id) AS MaxDateTime
FROM salon_promo
GROUP BY salon_id)
groupedtt ON tt.salon_id = groupedtt.salon_id
AND tt.promo_id = groupedtt.MaxDateTime)
INNER JOIN salons USING (salon_id)
SELECT * from salon_promo INNER JOIN salons USING (salon_id)
并接收以下错误消息:
错误:您的SQL语法有错误;检查与您的MariaDB服务器版本相对应的手册,了解第1行“内部加入沙龙使用(沙龙id)”附近使用的正确语法
当我使用以下查询时:
(
SELECT * FROM salon_promo tt
INNER JOIN
(SELECT salon_id, MAX(promo_id) AS MaxDateTime
FROM salon_promo
GROUP BY salon_id)
groupedtt ON tt.salon_id = groupedtt.salon_id
AND tt.promo_id = groupedtt.MaxDateTime)
INNER JOIN salons USING (salon_id)
SELECT * from salon_promo INNER JOIN salons USING (salon_id)
一切正常。并从()查询:
也很好。什么会导致问题?您的查询错误 这个 应该是
groupedtt.MaxDateTime
最后一个问题是
SELECT *
FROM salon_promo tt
INNER JOIN (
SELECT salon_id, MAX(promo_id) AS MaxDateTime
FROM salon_promo
GROUP BY salon_id)
groupedtt ON tt.salon_id = groupedtt.salon_id
AND tt.promo_id = groupedtt.MaxDateTime
INNER JOIN salons USING (salon_id)
错误:from子句中的“salon_id”列不明确
MaxDateTime
是字段名称。(…MAX(promo_id)作为MaxDateTime…
)@Abdulla-yep,就是这样!但是,我们必须在tt.salon\u id=salons.salon\u id上使用(salon\u id)(使用doesn't'work)@NikitaPronchik乐于帮助:)