Question

我无法弄清楚这种语法有什么问题。我在最后一行收到＃1064语法错误。

SELECT b.id, b.lastname, b.name, c.balance, a.maxdebt, b.warndata, b.warndownload, b.warnupload, b.warndebt, b.cutoffdata, b.cutoffdownload, b.cutoffupload, b.cutoffdebt, b.data, b.download, b.upload, b.warning, b.access, b.cutoffstop
FROM (
SELECT customers.id AS id, SUM(tariffs.value) AS maxdebt
            FROM tariffs
            INNER JOIN assignments ON tariffs.id = assignments.tariffid
            INNER JOIN customers ON assignments.customerid = customers.id
            GROUP BY id
) a
LEFT JOIN (
SELECT customers.id AS id, UPPER(lastname) AS lastname, customers.name AS name, SUM(stats.upload+stats.download) AS data, SUM(stats.download) AS download, SUM(stats.upload) AS upload, cutoffstop, warndata, warndownload, warnupload, warndebt, cutoffdata, cutoffdownload, cutoffupload, cutoffdebt, warning, access
        FROM customers
        LEFT JOIN nodes ON customers.id = nodes.ownerid
        LEFT JOIN stats ON nodes.id = stats.nodeid
        LEFT JOIN customerwarnings ON customers.id = customerwarnings.id
    GROUP BY id
) b
LEFT JOIN (
SELECT customerid, SUM(cash.value) AS balance
        FROM cash
        GROUP BY customerid
) c ON a.id = b.id = c.customerid

我尝试使用RIGHT和LEFT JOINS加入表格以查看是否存在差异，但它们会给我同样的错误。工作中的不同查询对自己很好，但是当我在这个查询中将它们连接在一起时，我得到语法错误。有没有人知道我应该或不应该做什么？

错误：“＃1064 - 您的SQL语法出错;请查看与您的MySQL服务器版本对应的手册，以便在第21行附近使用正确的语法

Answer 1

以下是Multiple LEFT JOIN

的参考资料

SELECT b.id, b.lastname, b.name, c.balance, a.maxdebt, b.warndata, b.warndownload, b.warnupload, b.warndebt, b.cutoffdata, b.cutoffdownload, b.cutoffupload, b.cutoffdebt, b.data, b.download, b.upload, b.warning, b.access, b.cutoffstop
FROM (
SELECT customers.id AS id, SUM(tariffs.value) AS maxdebt
            FROM tariffs
            INNER JOIN assignments ON tariffs.id = assignments.tariffid
            INNER JOIN customers ON assignments.customerid = customers.id
            GROUP BY id
) a
LEFT JOIN (
SELECT customers.id AS id, UPPER(lastname) AS lastname, customers.name AS name, SUM(stats.upload+stats.download) AS data, SUM(stats.download) AS download, SUM(stats.upload) AS upload, customers.cutoffstop, warndata, warndownload, warnupload, warndebt, cutoffdata, cutoffdownload, cutoffupload, cutoffdebt, nodes.warning, nodes.access
        FROM customers
        LEFT JOIN nodes ON customers.id = nodes.ownerid
        LEFT JOIN stats ON nodes.id = stats.nodeid
        LEFT JOIN customerwarnings ON customers.id = customerwarnings.id
    GROUP BY id
) b ON a.id = b.id
LEFT JOIN (
SELECT customerid, SUM(cash.value) AS balance
        FROM cash
        GROUP BY customerid
) c ON a.id = c.customerid

另有1064语法错误

1 个答案: