Selenium Upload document scenarios

Question

Unable to click and Select upload button Click on upload button Window popup open to select the file from local drive Select file and upload

`<form name="uploadForm" action="" enctype="multipart/form-data" method="post"><input type="file" name="fileName" id="fileName" style="position:relative;left:-8px;top:-5px;width:100%;margin-left:5px;"> <input type="hidden" name="TARGET_URL" id="TARGET_URL"></form>`

Xpath says - >  //*[@id="fileName"]

Still unable to click with below code (By.xpath("//*[@id='fileName']")).click();