Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_46742 ( "Country" text, "Amateur Era" real, "Open Era" real, "All-time" real, "First title" real, "Last title" real )

### Question ###
What is the sum of All-Time, when Amateur Era is less than 0?

### Accurate SQL ###

SELECT SUM("All-time") FROM table_46742 WHERE "Amateur Era" < '0'