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 has_pet (stuid VARCHAR)
TABLE: CREATE TABLE student (stuid VARCHAR)

### Question ###
For students who have pets , how many pets does each student have ? list their ids instead of names .

### Accurate SQL ###

SELECT COUNT(*), t1.stuid FROM student AS t1 JOIN has_pet AS t2 ON t1.stuid = t2.stuid GROUP BY t1.stuid