检索的全文检索

我公司通过与全文检索3页不同的表查找受影响的表，我需要检测的结果是来自哪个表。这是我现在有：检索的全文检索

SELECT id, title AS page_title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM pages WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) UNION 
SELECT id, title AS agenda_title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM agenda WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) UNION 
SELECT id, title AS news_title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM news WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) ORDER BY score ASC

如果PAGE_TITLE已设置我检测，如果没有，如果议程标题已定等但结果总是从第一个查询（页）。因此，如果访问者搜索并查找新闻项目，则会在此情况下显示为页面。

所以我的问题是;我究竟做错了什么？这是做这件事的最好方法吗？

在此先感谢！

来源

2011-05-30 Jesse

当您使用UNIONs那样，添加一个决定因素列，只是一个常数，对每个表，让你知道每个条目来自哪个表的。

SELECT source, id, title, score 
    FROM 
    (SELECT 'pages' AS source, id, title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score 
     FROM pages WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) 
    UNION 
    SELECT 'agenda' AS source, id, title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score 
     FROM agenda WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) UNION 
    SELECT 'news' AS source, id, title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score 
     FROM news WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) 
) ORDER BY score ASC

您还需要在SELECT在整个组合集来包装它ORDER BY，你有那只在最后一个表，我认为顺序的方式。改变title属性不是一个好主意，或者，作为列名必须是相同的UNION或将与第一个遇到的标题，或只是空白列名合并。

来源

2011-05-30 12:54:30 Orbling

尝试像查询：

SELECT 'pages' AS used_table,id, title, MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM pages WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) UNION 
SELECT 'agenda' AS used_table,id, title , MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM agenda WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) UNION 
SELECT 'news' AS used_table,id, title , MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) AS score FROM news WHERE MATCH(title) AGAINST(:search_term IN BOOLEAN MODE) ORDER BY score ASC

，并检查used_table现场检查使用巫表。

来源

2011-05-30 12:53:10 XzKto

检索的全文检索

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