sql - How can I return unique rows when using an INNER JOIN in MySQL? -


I have 3 tables: links, keywords, and keyword_link can have many keywords in one link, and one in many links Can be the only keyword. Used to join keyword_link to link and keyword . When I run the following query, several lines of the same link are returned because multiple keywords match. How do I modify this query to return unique rows? 

  SELECT links * Include link 'links' from keywords_links.link_id = Add keywords_completions on ID Add keywords to keywords. Keywords = _links.keyword_id where the keyword. Keyword IN ('php', 'sql', 'html', 'css')    
 
 < P> Select the easiest way  DISTINCT  after  select :  
  select different links. * ... ...   
 But perhaps a more efficient solution would be to write to you that it does not need to make a difference in each column:  
  SELECT a. * Join INNER from the link (SELECT a.link_id Inner Join keyword with keyword b on one) Keyword_id = b.id and b.keyword IN ('php', 'sql', 'html', 'css') by group A.link_id) b at a.id = b.link_id

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