title: How to use GROUP_CONCAT without GROUP BY in my case?
body: <p>This is my following Query </p>
  
  <pre><code>SELECT CONCAT( "[",
                 GROUP_CONCAT(JSON_OBJECT( `expenses`.`expense_type`, `expenses`.`amount`,'date',`expenses`.`updated_time`))  ,
                 "]"
               )
  FROM expenses
  GROUP BY `expenses`.`expense_type`
  </code></pre>
  
  <p>How to use this query without group by like i need all rows inside single json array with json object.</p>