使用Match Against進行全文搜索 - 將相關性設置爲

我有以下查詢，但試圖添加ORDER BY relevance DESC。誰能告訴我正確的語法，因爲我沒有成功，將是工作，收到沒有匹配的結果：使用Match Against進行全文搜索 - 將相關性設置爲

$query = 
"(SELECT postid as id, title as name, 'post' as type FROM post WHERE MATCH (title, content) AGAINST ('$keywords' IN BOOLEAN MODE))   
UNION 
(SELECT pdid as id, pdname as name, 'product' as type FROM product WHERE MATCH (pdname, pddesc, pddetail) AGAINST ('$keywords' IN BOOLEAN MODE))";

這是我曾嘗試：

$query = 
"(SELECT postid as id, title as name, 'post' as type MATCH (title, content) AGAINST ('$keywords' IN BOOLEAN MODE) as relevance FROM post 
WHERE MATCH (title, content) AGAINST ('$keywords' IN BOOLEAN MODE))   
UNION 
(SELECT pdid as id, pdname as name, 'product' as type MATCH (pdname, pddesc, pddetail) AGAINST ('$keywords' IN BOOLEAN MODE) as relevance FROM product 
WHERE MATCH (pdname, pddesc, pddetail) AGAINST ('$keywords' IN BOOLEAN MODE)) 
ORDER BY relevance DESC 
";

來源

2015-07-06 Michael Eugene Yuen

這是（和你以前刪除的問題）現在都工作嗎？ – halfer

是的，嗨！ :)我對此很陌生，專注於正確的語法，同時忽略了一些基本的錯誤。 –

太棒了。你會回答最後一個問題嗎？你可以自己接受它，這標誌着問題已經解決。關於答案，如果你有一個逗號缺失，這聽起來像是一個SQL語法錯誤，但你沒有在你的PHP中檢測到錯誤。一些錯誤檢測代碼在這裏會有很大的幫助。 – halfer

$query = 
"(SELECT postid as id, title as name, 'post' as type, MATCH (title, content) AGAINST ('$keywords' IN BOOLEAN MODE) as relevance FROM post 
WHERE MATCH (title, content) AGAINST ('$keywords' IN BOOLEAN MODE))   
UNION 
(SELECT pdid as id, pdname as name, 'product' as type, MATCH (pdname, pddesc, pddetail) AGAINST ('$keywords' IN BOOLEAN MODE) as relevance FROM product 
WHERE MATCH (pdname, pddesc, pddetail) AGAINST ('$keywords' IN BOOLEAN MODE)) 
ORDER BY relevance DESC 
";

我發現'as type'之後缺少逗號。編輯後，它現在工作正常。

問題解決了，運轉良好。

來源

2015-07-06 09:58:06

使用Match Against進行全文搜索 - 將相關性設置爲

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