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_204_147 ( id number, "#" number, "date" text, "opponent" text, "score" text, "win" text, "loss" text, "save" text, "attendance" number, "record" text )

### Question ###
what is the difference in attendance between the game on july 7th and the game on july 8th ?

### Accurate SQL ###

SELECT ABS((SELECT "attendance" FROM table_204_147 WHERE "date" = 'july 7') - (SELECT "attendance" FROM table_204_147 WHERE "date" = 'july 8'))