我有以下的SQL查詢,並且需要弄清楚「簽名」數據實際上是從哪裏讀取的。這不是來自'索賠'表,並且似乎不是來自'questionnaire_answers'表。我相信這將是一個布爾值,如果這有幫助的話。在此查詢中讀取的簽名值在哪裏?
我很熟練掌握SQL,但連接讓我有點困惑。
(有一些PHP,但它與問題無關)。
$SQL="SELECT surveyor, COUNT(signed_total) AS 'total', SUM(signed_total) AS 'signed_total' FROM (
SELECT DISTINCT claims.claim_id, CONCAT(surveyors.user_first_name, CONCAT(' ', surveyors.user_surname)) AS 'surveyor', CASE WHEN signatures.claim_id IS NOT NULL THEN 1 ELSE 0 END AS 'signed_total' FROM claims
INNER JOIN users surveyors ON claims.surveyor_id = surveyors.user_id
LEFT OUTER JOIN signatures ON claims.claim_id = signatures.claim_id
INNER JOIN questionnaire_answers ON questionnaire_answers.claim_id = claims.claim_id
WHERE (claims.claim_type <> ".$conn->qstr(TYPE_DESKTOP).")
AND (claims.claim_type <> ".$conn->qstr(TYPE_AUDIT).")
AND (claims.claim_cancelled_id <= 0)
AND (claims.date_completed BETWEEN '".UK2USDate($start_date)." 00:00:00' AND '".UK2USDate($end_date)." 23:59:59')
) AS tmp
GROUP BY surveyor
ORDER BY surveyor ASC
";
謝謝!
簽名是一個表(請參閱'左外部連接簽名')。 – 2014-10-16 10:49:48
就這樣。我在構成系統數據庫的200多張表中錯過了它。介意發佈這個答案,以便我可以接受? – JakeSteam 2014-10-16 10:51:13
有時賺點很容易:-) – 2014-10-16 10:52:14