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 church (open_date VARCHAR)

### Question ###
Show all opening years and the number of churches that opened in that year.

### Accurate SQL ###

SELECT open_date, COUNT(*) FROM church GROUP BY open_date