如何在 Laravel Eloquent 中编写一个 select 查询，其中 DISTINCT 嵌套在 COUNT 中？

Question

How can I achieve this is Eloquent:我怎样才能做到这一点是Eloquent：

select count(distinct(SID)) from history where `Date` < '2020-08-19'

Answer 1

You can try你可以试试

History::distinct()->where('Date','<','2020-09-19')->count()

for choosing a specific column provide the column name inside the distinct function用于选择特定列提供不同 function 内的列名

distinct('SID')

if your Model is named History, i have no idea whats your model name is:)如果您的 Model 被命名为 History，我不知道您的 model 名称是什么：)

Answer 2

$data = History::where('Date','<',''2020-09-19)->count();