这段MySQL说的是什么意思？

Question

Accept input from user into $state_abbr

Select state_name into $state_name from state where state_abbr = $state_abbr;

Set display field = $state_name

Answer 1

没接触过，但是我猜一猜蒙一蒙，接受用户的输入赋值给state_abbr，$应该是变量的意思，然后根据条件state_abbr查出state_name赋值给state_name变量，再把变量state_name赋值给展示出来的属性？当然，仅是猜测