Postgresql 未定义与my pgsql联接的关系

我是新手，还没有找到适合我的表联接的语法

SELECT
DISTINCT on (date (billing.starttime))
medias.name,
date (billing.starttime),
Count(distinct (billing.starttime)) as "# Plays",
Count(distinct(billing.playerid)) as "# Stores"

FROM
public.billing,
public.medias

JOIN ????? on billing.mediaitemid = medias.id

WHERE
medias.name LIKE any (array['COMM_7032%']) and
billing.starttime >= date('2017-04-26') and 
billing.starttime < date('2017-05-01') 

GROUP BY
date (billing.starttime),
medias.name

ORDER BY
date (billing.starttime)

我不确定什么东西放在哪里？？？？？是我尝试过的所有东西都表明这种关系不存在。

应该是：

from
    public.billing b
    inner join
    public.medias m on b.mediaitemid = m.id

...
FROM
public.billing JOIN public.medias on billing.mediaitemid = medias.id
WHERE
...

语法是

[table1] join [table2] on [condition]

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请出示您的完整查询