INNER JOIN AND LIMIT INNER TABLE by 1 AND ORDERBY ID

Question

このクエリはレコードを返しません。誰かが私が間違っていることを修正するのに役立つことができますか？内側のテーブルに1行しか取得しないようにします（つまり、左のテーブルをID DESCで最初の順序にしてからLIMIT 1にし、最初の結果を昇順で取得します）。

$query = "select fsp_issue_log.ISSUE_SERIAL_NUM , fsp_issue_log.STATUS, fsp_issue_log.DATECREATED, fsp_issue_log.ASSIGNEDTO, fsp_issue_log.ORG 
, fsp_issue_log.SEVERITY 
, fsp_issue_log.DESCRIPTION 
, fsp_ticket_hist.COMMENTS 
FROM fsp_issue_log 
JOIN 
(SELECT COMMENTS 
    FROM fsp_ticket_hist 
    ORDER 
     BY ID DESC 
    LIMIT 1 
) 
ON fsp_issue_log.ISSUE_SERIAL_NUM = fsp_ticket_hist.TICKET_SN 
"; 

Answer 1

で試してみてください。

select fsp_issue_log.ISSUE_SERIAL_NUM , fsp_issue_log.STATUS, fsp_issue_log.DATECREATED, fsp_issue_log.ASSIGNEDTO, fsp_issue_log.ORG 
, fsp_issue_log.SEVERITY 
, fsp_issue_log.DESCRIPTION 
, fsp_ticket_hist.COMMENTS 
FROM fsp_ticket_hist 
INNER JOIN fsp_issue_log ON fsp_issue_log.ISSUE_SERIAL_NUM = fsp_ticket_hist.TICKET_SN 
GROUP BY fsp_ticket_hist.ID 
ORDER BY fsp_ticket_hist.ID DESC LIMIT 1