[SQL] How do I replace select ... into commands?

[Richard Sydney-Smith]

I have a number of sybase procedures in which I use something like   declare mx : integer; begin select max(field) from table into mx; return mx; end;   Postgresql is telling me that select...into has not been implemented yet. what is the best way to perform this action with the commands offered in plpgsql?   much thanks for the earlier help.   Sincerely Richard Sydney-Smith