title: Golang - Why SQL placeholder not work?
body: <p>My code is as follow (I use gorm):</p>
  
  <pre><code>e.GET("/search", func(c echo.Context) error {
      keyword := c.QueryParam("keyword")
  
      results := make([]searchResult, 0)
      if keyword != "" {
          db, err := models.ConnectDB()
          defer db.Close()
          if err != nil {
              return err
          }
  
          rows, err := db.Raw("SELECT songs.name, singers.name, albums.name FROM songs, singers, albums WHERE (songs.singer_id = singers.id AND songs.album_id = albums.id) AND (songs.name LIKE '%?%' OR singers.name LIKE '%?%' OR albums.name LIKE '%?%')", keyword, keyword, keyword).Rows()
          defer rows.Close()
  
          var songName, singerName, albumName string
          if err == nil {
              for rows.Next() {
                  rows.Scan(&amp;songName, &amp;singerName, &amp;albumName)
                  results = append(results, searchResult{
                      SongName:   songName,
                      SingerName: singerName,
                      AlbumName:  albumName,
                  })
              }
          } else {
              return err
          }
      }
      return c.Render(http.StatusOK, "search", results)
  })
  </code></pre>
  
  <p>I got error: <code>sql: statement expects 0 inputs; got 3</code>, so it means the placeholder didn't be parsed. Could anyone give me some idea? </p>
  
  <p>I can't find out why by myself.</p>
  
  <p>Please help me. Thanks.</p>