我正在向实体对象写一个查询，是否可以在列上使用distinct？以下是我的查询
<div style='background-color:#C0C8D0;width:95%;'>SMA Forráskód: <a href='' onclick='selectcode(93347);return false;'>[ Mindet kijelol ]</a></div><div id='93347' style="width:95%;max-width:95%;max-height: 500px; overflow:scroll;background-color: #FFFFFF;"><pre class="sma" style="font-family:monospace;font-size: 12px;"><ol><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line1</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line2</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line3</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line4</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line5</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">line6</div></li></ol></pre></div>