title: concatenate strings of one column separated by comma in R
body: <p>I would like to concatenate string with double quotes which is in a column followed by comma as I would like import this to an SQL query.</p>
  <pre><code>   A&lt;-c('John', 'Kate', 'Kaitlyn', 'Arun',' Chen')
     df&lt;- data.frame(A)
      
  </code></pre>
  <p>So I would like to concatenate all the rows of A and get a string from this column A and would like to get the output as text file. Below is the expected text. Any suggestions?</p>
  <pre><code>        &quot;John&quot;, &quot;Kate&quot;, &quot;Kaitlyn&quot;, &quot;Arun&quot;, &quot;Chen&quot; 
  </code></pre>