https://preprod.theatre-contemporain.net/biographies/5c94cbc71d969/dates/?path=biographies%2F5c94cbc71d969%2Fdates%2F

id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE j3 const PRIMARY PRIMARY 4 const 1 Using index
1 SIMPLE j2 ref PRIMARY, idclassification PRIMARY 4 const 1 Using index
1 SIMPLE j1 eq_ref PRIMARY PRIMARY 4 theatreok_dev.j2.idclassification 1