SQL語法錯誤：靠近「。」？

Question

當我嘗試運行此查詢：

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 

我得到這個錯誤：

內部錯誤 語法錯誤：「」附近：語法錯誤

Answer 1

我不知道你是什麼正在嘗試做，但這種方式的語法是正確的。但我不知道它是否顯示你想要的結果，如果sqlite支持這...

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)