mysql流程控制函數(shù)語句這個錯在哪里了？

xinn2003

use test1
go
if rls in(select name from teacher where age=22)
print  as '任老師年齡22歲'
ELSE
print  as '任老師年齡不是22歲'
提示錯誤如下：

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'go
if rls in(select name from teacher where age=22)
print  as '任老師年' at line 2

xinn2003

幫忙看看謝謝了。