Lavarel sql查询..如果条件在哪里

Question

我刚开始学习Laravel并将常规PHP代码转换为Laravel。 我需要在Laravel中执行此查询，但失败。

SELECT sum(qty_del) as delivery from delivery_sap a where YEAR(a.bill_date) + IF(MONTH(a.bill_date)>6, 1, 0) = 2017 

这是我想出来的，但它失败了。

$data = DB::table('delivery_sap') 
      ->select(DB::raw('sum(qty_del) as delivery')) 
      ->whereRaw('YEAR(a.bill_date) + IF(MONTH(a.bill_date)>6, 1, 0) = 2017'); 

基于以下

$data = DB::table('delivery_sap') 
     ->select(DB::raw('sum(qty_del) as delivery')) 
     ->whereRaw('YEAR(bill_date) + IF(MONTH(bill_date)>6, 1, 0) = 2017') 
     ->first(); 

答案从GET（改变）

更正查询第一，因为我想它返回的一行

Answer 1

您可以通过查询转储生成的查询并将其与原始查询进行比较：

use Illuminate\Support\Facades\DB; 

$query = DB::table('delivery_sap') 
    ->select(DB::raw('sum(qty_del) as delivery')) 
    ->whereRaw('YEAR(a.bill_date) + IF(MONTH(a.bill_date)>6, 1, 0) = 2017'); 

dd($query->toSql()); 

返回：

"select sum(qty_del) as delivery from `delivery_sap` where YEAR(a.bill_date) + IF(MONTH(a.bill_date)>6, 1, 0) = 2017" 

这与您的原始查询几乎完全相同。您需要连接呼叫与最后的get()以检索结果：

$data = DB::table('delivery_sap AS a') 
    ->select(DB::raw('sum(qty_del) as delivery')) 
    ->whereRaw('YEAR(a.bill_date) + IF(MONTH(a.bill_date)>6, 1, 0) = 2017') 
    ->get(); // <= Here