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_30174 ( "Winners" text, "Match points" text, "Aggregate score" text, "Points margin" real, "Losers" text )

### Question ###
how many total number of points margin when brive is the winners

### Accurate SQL ###

SELECT COUNT("Points margin") FROM table_30174 WHERE "Winners" = 'Brive'