SQL語法錯誤：“。”附近？

Question

當我嘗試運行此查詢時：

UPDATE Line_Master 
SET Line_Master.line_count = t2.task_count FROM (SELECT COUNT (am.line_id) AS task_count, lm.lineId
   FROM Assets_Master am,Line_Master lm,Section_Master sm,Task_Point_Master tpm,Task_Master TM
   WHERE (lm.line_id = am.line_id)
     AND (am.asset_id = sm.asset_id)
     AND (sm.section_id = tpm.section_id)
     AND (tm.task_point_id = tpm.task_point_id)
   GROUP BY lm.line_id) t2
WHERE Line_Master.line_id = t2.lineId

我收到此錯誤：

內部錯誤語法錯誤：“。”附近：語法錯誤

Answer 1

我不知道您要做什么，但是這樣語法是正確的。 但是我不知道它是否顯示您想要的結果以及sqlite是否支持此...

UPDATE Line_Master 
SET Line_Master.line_count = (SELECT t2.task_count FROM (SELECT COUNT (am.line_id) AS task_count, lm.lineId
   FROM Assets_Master am,Line_Master lm,Section_Master sm,Task_Point_Master tpm,Task_Master TM
   WHERE (lm.line_id = am.line_id)
     AND (am.asset_id = sm.asset_id)
     AND (sm.section_id = tpm.section_id)
     AND (tm.task_point_id = tpm.task_point_id)
   GROUP BY lm.line_id) t2
   WHERE Line_Master.line_id = t2.lineId)