我是SQL新手,爲什麼這段代碼無法執行而不知所措。我知道錯誤,但沒有得到任何結果。無論等待多久,代碼都會繼續處理。我知道這個問題可能與我的特定數據庫有關,但我想知道是否有任何明顯的錯誤。將不會執行的SQL查詢
此外,如果它與我在我的數據庫中進行的調用有關,那麼我將如何去調試它,因爲我沒有正式的錯誤?
SELECT cr.COMMUNICATIONS_ID AS ANSWER_ID, cr.CONSUMER_ID as VIEWER_ID,
cr.ACTION_LOG_ID, nc.PARENT_COMMUNICATIONS_ID AS QUESTION_ID,
cirm.CONSUMER_RATING AS VIEWER_INTEREST,
cim.CONSUMER_INTEREST_EXPERT_ID AS DOMAIN
FROM (
SELECT 234 AS CONSUMER_ID, ACTION_LOG_ID, COMMUNICATIONS_ID
FROM consumer_action_log
WHERE COMM_TYPE_ID=4
) AS cr
JOIN network_communications AS nc ON
cr.COMMUNICATIONS_ID=nc.COMMUNICATIONS_ID
JOIN communication_interest_mapping AS cim ON
nc.PARENT_COMMUNICATIONS_ID=cim.COMMUNICATION_ID
JOIN consumer_interest_rating_mapping AS cirm ON
cr.CONSUMER_ID=cirm.CONSUMER_ID AND
cim.CONSUMER_INTEREST_EXPERT_ID=cirm.CONSUMER_INTEREST_ID;
你正在使用哪個數據庫包? – 2011-01-26 01:41:52
Toad,DBVisualizer和PHPMyAdmin – Spencer 2011-01-26 01:43:45
您是否嘗試過使用EXPLAIN或Toad等價物? – Spechal 2011-01-26 01:48:50