显示来自数据库的即时搜索结果

Question

我有一个搜索表，并在输入第一个字母时使用下面的代码显示即时结果：

$("#searchterm").keyup(function(e) {
  var q = $("#searchterm").val();
  $.getJSON("http://en.wikipedia.org/w/api.php?callback=?", {
      srsearch: q,
      action: "query",
      list: "search",
      format: "json"
    },
    function(data) {
      $("#results").empty();
      $.each(data.query.search, function(i, item) {
        $("#results").append("<div><a class='result-search-title' href='http://en.wikipedia.org/wiki/" + encodeURIComponent(item.title) + "'>" + item.title + "</a><br><p class='result-search-desc'>" + item.snippet + "</p></div>");
      });
    });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="livesearch">
  <div id="form-search">
    <input id="searchterm" placeholder="Her leiti eg ..." />
    <button id="search">search</button>
    <div id="overlay"></div>
  </div>
  <div id="results"></div>
</div>

如何更改它以从数据库中获取数据：表：tx_book和列：title