Oracle SQL查詢問題ORA-00923：找不到FROM關鍵字

Question

我在Java類中有一個sql查詢。 當我運行它時，它給我這個錯誤ORA-00923：在期望的位置找不到FROM關鍵字。 我發現了類似的問題，但我似乎無法理解我在做什么錯。

查詢是：

        String sqlQueryCM = "insert into customers_messages"
            +" (customer_id, message_id, status)"
            +" select gc.customer_id,? as gm.message_id, 0"
            +" from groups_customers gc join cgroups cg on gc.group_id = cg.id"
            +" join groups_messages gm on gc.group_id = ?"
            +" join messages m on gm.message_id = m.id left"
            +" join customers_messages cm on gc.customer_id = cm.customer_id and gm.message_id = cm.message_id"
            +" where cm.message_id = ?"
            +" and m.message_published = 1"
            +" and (cg.start_date is null or to_char(cg.start_date,'YYYYMMDD') <= to_char(sysdate,'YYYYMMDD'))"
            +" and (cg.end_date is null or to_char(cg.end_date,'YYYYMMDD') >= to_char(sysdate,'YYYYMMDD'))"
            +" and (m.start_date is null or to_char(m.start_date,'YYYYMMDD') <= to_char(sysdate,'YYYYMMDD'))"
            +" and (m.end_date is null or to_char(m.end_date,'YYYYMMDD') >= to_char(sysdate,'YYYYMMDD'))"
            +" and cm.status is null";

Answer 1

嘗試更換這條線

+" join customers_messages cm on gc.customer_id = cm.customer_id and gm.message_id = cm.message_id"

通過

+" join customers_messages cm on (gc.customer_id = cm.customer_id and gm.message_id = cm.message_id)"

編輯：將最后一個（替換為）。 抱歉打錯了。