syntax - Does MySQL support "IF EXISTS"? -

I think that I have a conflict between my knowledge on SQL Server and MySQL.
When I run this query, I get an error from MySQL:

  if selected (select * from tbl_admin) then select 'OK'; end if;   
 The error message is:  
 
 [er] 1064 - There is an error in your SQL syntax; To use the nearest 'if' EXISTS (select * from tbl_admin), check the '1' manual related to your MySQL server version for the correct syntax - Choose '1' where 'exists' at line 1 '/' >  
 Please help me and tell me that I am wrong to write this question? such a fuss? 
 I have to do something if I have to do something in the  tbl_admin  table.   
 
  
 edit  
 To check whether any data in the table can be done or not:  
  Choose from where to double 'OK' (select * to tbl_admin);