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_21734764_1 ( administrative_division VARCHAR, population_2011_siak_database VARCHAR )

### Question ###
Which administrative division had a 2011 population of 606,699 according to the siak database?

### Accurate SQL ###

SELECT administrative_division FROM table_21734764_1 WHERE population_2011_siak_database = "606,699"