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_67346 ( "Poll source" text, "Date(s) administered" text, "Sample size" text, "Margin of error" text, "Jerry Brown (D)" text, "Meg Whitman (R)" text )

### Question ###
How many people were surveyed in the poll from June 30, 2010?

### Accurate SQL ###

SELECT "Sample size" FROM table_67346 WHERE "Date(s) administered" = 'june 30, 2010'