Question

while True:  
print "You wake up in a dim room. Cold water trickles down your spine through the rags you are wearing." 
  break
while True:
  q1 = raw_input("Exit or Explore? ")
  if q1 in ("explore", "Explore","EXPLORE",):
    print "You search the room. All you find is a small, maroon object. You reach for it, but all of the sudden, it explodes. You are dead."
    exit()
  elif q1 in ("exit","EXIT","Exit",):
    print "Light flashes before your eyes as you find yourself on a scenic mountaintop. It drops to the north and west. To the east is a winding road. In the distance you see a village."
  else:
    print "..."
  q2 = raw_input("Which direction do you go? ")
  if q2 in ("North","north","NORTH","West","west","WEST",):
    print "You clumsily stumble off the cliff. You are dead."
    exit()
  elif q2 in ("east","EAST","East",):
    print "You travel for a few hours and arrive at"
    break

此方法有效，但行以这种方式排序-$str = "25,12,13,19"; $sql = "select id, src, link from banners where id in (" . $str . ")";

如何获取按12,13,19,25值（即-$str）排序的行？

Answer 1

除非您对结果进行明确排序，否则引擎可以自由以任何顺序返回结果的行。要对结果进行排序，您必须包含一个ORDER BY子句。在这里您可以使用field()。它获取值在值列表中的位置。

SELECT d,
       src,
       link
       FROM banners
       WHERE id IN (25, 12, 13, 19)
       ORDER BY field(id, 25, 12, 13, 19);

选择自定义顺序的位置

1 个答案: