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_name_78 ( spike INTEGER, date_of_birth VARCHAR, block VARCHAR )

### Question ###
How many spikes have 28.09.1981 as the date of birth, with a block greater than 318?

### Accurate SQL ###

SELECT SUM(spike) FROM table_name_78 WHERE date_of_birth = "28.09.1981" AND block > 318