How to just pull out one field with the maximum value from 2 different tables in postgres?

Question

PostgreSQL

This is how it didn't work:

SELECT 
  MAX(t_places.sys_date_update) , 
  MAX(t_category_cargo.sys_date_update) 
FROM 
  t_places 
      JOIN 
  t_category_cargo;

An error occurs:
ERROR: syntax error at or near ";"
LINE 7: t_cargo;
^
********** Error **********
ERROR: syntax error at or near ";"
SQL state: 42601
Symbol: 116
Both tables exist in the database and have corresponding fields. Separately:

SELECT 
  MAX(t_places.sys_date_update) 
FROM 
  t_places ;

and

SELECT 
  MAX(t_category_cargo.sys_date_update) 
FROM 
  t_category_cargo;

Work out

Answer 1

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