mysql-Postgres中插入查询别名的语法错误

我有这个查询：

INSERT INTO emailevents (shopid, userid, emailid, campaignid, variationid, type, createdon) 
VALUES ($1,                 
(SELECT id FROM users WHERE mongoid=$2), 
(SELECT id FROM emails WHERE mongoid=$3), 
(SELECT id FROM campaigns WHERE mongoid=$4) AS cid, 
(SELECT id FROM campaignvariations WHERE templateid=(SELECT id FROM templates WHERE mongoid=$5) AND campaignid=cid), 
$6, 
to_timestamp($7))

而我收到此错误：查询失败：错误：“ AS”处或附近的语法错误

我尝试将cid放在支架中,但没有成功.

我应该如何使用别名？

解决方法:

尝试更改以选择而不是如下所示的值

INSERT INTO emailevents (shopid, userid, emailid, campaignid, variationid, type, createdon)      
select $1,                 
       (SELECT id FROM users WHERE mongoid=$2), 
       (SELECT id FROM emails WHERE mongoid=$3), 
       (SELECT id FROM campaigns WHERE mongoid=$4) AS cid, 
       (SELECT id FROM campaignvariations WHERE templateid=(SELECT id FROM templates WHERE mongoid=$5) AND campaignid=(SELECT id FROM campaigns WHERE mongoid=$4)), 
       $6, 
       to_timestamp($7)

我认为您应该用(variantid列的(SELECT id FROM campaigns WHERE mongoid = $4)替换cit