最佳答案
select c.candidateId, c.candidatename,
count(sc.candidate_tbl_candidateId) as vote_count
from candidate_tbl c
left join student_tbl_has_candidate_tbl sc on sc.candidate_tbl_candidateId = c.candidateId
group by c.candidateId, c.candidatename
关于c# - 如何计算某个项目在列中存在的次数?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48358334/