title: How can multiply two value in sql in row and put the result in the another cell in the same row?
body: <p>I have table called 'Task'</p>
  
  <p>have four column (id , x, y  and x*y)</p>
  
  <p>i only enter the values (id, x and  y)</p>
  
  <p>need trigger or other thing when i entered the values calculate automatic the value 'x*y' </p>
  
  <p>thanks , </p>