Laravel-Mysql从连接表中获取元素

我从与部门表相关的cars表中获取总的CAROwnerDepartment id 但我无法从cars表中了解问题

这是密码

$dept = DB::table('department')
->select('department.name', DB::raw('COUNT(cars.carOwnerDept) AS dept_count'))
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', 'cars.issue')
->groupBy('department.name')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->get();

观点

数据库结构

汽车

身份证|车主身份证|问题 1 1条形码问题 2.3扫描仪问题 3.2条形码问题

系

id |名称 1质量保证 2页 3.试试这个

$dept = DB::table('department')
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', DB::raw('COUNT(cars.carOwnerDept) AS dept_count'), 'cars.issue')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->groupBy('department.name')
->get();

试试这个

$dept = DB::table('department')
->join('cars', 'department.id', '=', 'cars.carOwnerDept')
->select('department.name', DB::raw('COUNT(cars.carOwnerDept) AS dept_count'), 'cars.issue')
->where('cars.carType', '=', 'Internal Customer')
->whereDate('cars.created_at', '>=', $from)
->whereDate('cars.created_at', '<=', $to)
->groupBy('department.name')
->get();

---

您可以获得如下所示的车主部门数量

$dept = DB::table('department')
        ->select(DB::raw('(SELECT COUNT(carOwnerDept) FROM cars WHERE carOwnerDept=department.id) AS dept_count'))
        ->join('cars', 'department.id', '=', 'cars.carOwnerDept')
        ->select('department.name', 'cars.issue')
        ->where('cars.carType', '=', 'Internal Customer')
        ->whereDate('cars.created_at', '>=', $from)
        ->whereDate('cars.created_at', '<=', $to)
        ->get();

---

您可以获得如下所示的车主部门数量

$dept = DB::table('department')
        ->select(DB::raw('(SELECT COUNT(carOwnerDept) FROM cars WHERE carOwnerDept=department.id) AS dept_count'))
        ->join('cars', 'department.id', '=', 'cars.carOwnerDept')
        ->select('department.name', 'cars.issue')
        ->where('cars.carType', '=', 'Internal Customer')
        ->whereDate('cars.created_at', '>=', $from)
        ->whereDate('cars.created_at', '<=', $to)
        ->get();

---

我强烈建议您在模型上创建函数，这样就不需要输入原始查询。代码更少，更容易理解。

我强烈建议您在模型上创建函数，这样您就不需要输入原始查询。代码更少，更容易理解。

获取错误SQLSTATE[42S22]：未找到列：1054“字段列表”中的未知列“cars.issue”SQL:选择department.name，cars.issue from department:@Suvin94您需要加入需要从中获取数据的表。答案已更新。获取错误SQLSTATE[42S22]：未找到列：1054“字段列表”中的未知列“cars.issue”SQL:选择department.name，cars.issue from department:@Suvin94您需要加入需要从中获取数据的表。答案已更新。获取错误语法错误或访问冲突：选择列表的1055表达式3不在GROUP BY子句中，并且包含未聚合的列“cars.cars.issue”，该列在功能上不依赖GROUP BY子句中的列；这与sql_mode=only_full_group_by sql不兼容：select department.name，COUNTGetting a error语法错误或访问冲突：select list的1055表达式3不在group by子句中，并且包含未聚合的列“cars.cars.issue”，该列在功能上不依赖group by子句中的列；这与sql不兼容。\u mode=only\u full\u group\u by sql:select department.name，COUNT