title: Check if string contains leading letters
body: <p>How can I check if my string contains leading letters? In C# is easy, but I am doing this in SQL. Is there a way to check this? If so, how can I remove it?</p>
  
  <p>EX:
  @MyString = 'A1234'</p>
  
  <p>Updated string = '1234'</p>