sql-比较子字符串而不是整个字符串

我试图计算表中每个子字符串的数量，出于某种原因，它会计算整个字符串。我做错了什么？

试试：

select substring(datapath,1,5), COUNT(substring(datapath,1,5)) from batchinfo
where datapath like '%thc%'
group by datapath
having COUNT(substring(datapath,1,5))>1

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您只需按您试图计数的子字符串分组，而不是按完整的数据路径分组。也不需要对计数重复substring函数

select d, count(*)
from
(
    select substring(datapath,1,5) d from batchinfo
    where datapath like '%thc%'
)
group by d
having COUNT(*) > 1

---

你能提供一个简单的例子吗？我喜欢这个，因为你没有重复子字符串

select substring(datapath,1,5), COUNT(*) 
    from batchinfo
    where datapath like '%thc%'
    group by substring(datapath,1,5)
    having COUNT(*)>1