mysql - MySql 错误代码：1064 执行查询

Question

有人可以帮我弄清楚查询有什么问题吗？我收到“错误代码：1064 您的 SQL 语法有错误；” 尝试执行它时出错，但不明白为什么。

SELECT CASE WHEN WEEKDAY(h.createdDate) NOT IN (5,6) THEN (TIME_TO_SEC(EXTRACT(HOUR_MINUTE FROM h.nextCreatedDate)) - TIME_TO_SEC(EXTRACT(HOUR_MINUTE FROM h.CreatedDate))) / 60 / 24
            WHEN WEEKDAY(h.createdDate) IN (5,6) THEN TIME_TO_SEC(EXTRACT(HOUR_MINUTE FROM h.nextCreatedDate)) /60 24
            END AS t3,

 h.CaseId, h.CreatedDate, h.nextCreatedDate, h.Field, h.NewValue, h.Status


FROM (SELECT h.*, h.NewValue AS STATUS,
             (SELECT h2.CreatedDate
              FROM salesforce_case_history h2
              WHERE h2.Field = 'Status' AND h2.CreatedDate > h.CreatedDate AND
                    h2.CaseId = h.CaseId
              ORDER BY h2.CreatedDate
              LIMIT 1
             ) AS nextCreatedDate
      FROM salesforce_case_history h WHERE h.Field = 'Status'
     ) h
GROUP BY h.CaseId, h.Status