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_19787093_1 ( till_mathura VARCHAR, till_agra VARCHAR )

### Question ###
How many have the Till Agra of 500?

### Accurate SQL ###

SELECT COUNT(till_mathura) FROM table_19787093_1 WHERE till_agra = 500