如何将我的SQL查询编码为Laravel查询

Question

如何将以下SQL查询转换为Laravel查询？

SELECT roster_date, COUNT(DISTINCT truck_id) AS available_units
FROM truck_rosters
WHERE(truck_rosters.status = 'Active')

按组名日期分组

并与以下查询合并：

SELECT名单日期，COUNT（DISTINCT truck_id）作为总单位 从truck_rosters GROUP BY roster_date

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预期结果：

花名册日期| total_units | available_units

2019-08-30 | 11 | 3 2019-08-31 | 10 | 4

Answer 1

对两个计数使用条件聚合：

$rosters = DB::table('truck_rosters')
    ->select(DB::raw("COUNT(DISTINCT truck_id) AS total_units,
        COUNT(CASE WHEN status = 'Active' THEN 1 END) AS active_units, roster_date"))
    ->groupBy('roster_date')
    ->get();