搜索连接表仅显示来自一个表的匹配数据

Question

我尝试使用以下查询执行搜索：

        SELECT 
            *
        FROM 
            question_index
        JOIN
            question_content
            ON question_index.id = question_content.question_id
        WHERE
            question_index.remove = '0' AND
            question_index.active = '1' AND         
            question_index.publish_date <= '$current_time' AND
            (
                question_index.question LIKE '%$keyword%' OR
                question_content.text LIKE '%$keyword%'
            )
        GROUP BY
            question_index.id
        ORDER BY 
            question_index.publish_date DESC

我想要做的是搜索在两个表中运行并显示与＆＃34; question_index.question＆＃34;匹配的结果。或＆＃34; question_content.text＆＃34;

但是现在，它只显示符合＆＃34; question_content.text＆＃34;的结果。我尝试删除＆＃34; question_content.text LIKE＆＃39;％$ keyword％＆＃39;＆＃34;但结果根本没有出现。唯一可以获得匹配＆＃34; question_index.question＆＃34;如果我一起删除连接。但那不是我想要的结果。

Answer 1

  SELECT 
        *
    FROM 
        question_index LEFT
    JOIN
        question_content
        ON question_index.id = question_content.question_id
    WHERE
        question_index.remove = '0' AND
        question_index.active = '1' AND         
        question_index.publish_date <= '$current_time' AND
        (
            question_index.question LIKE '%$keyword%' OR
            question_content.text LIKE '%$keyword%'
        )
    GROUP BY
        question_index.id
    ORDER BY 
        question_index.publish_date DESC