How to find sum in laravel? three methods

Laravel is a popular PHP development framework that provides many convenient and flexible features when developing web applications. In this article, we will explore several methods of summing in Laravel.

Method 1: Use Query Builder

Laravel’s Query Builder is a powerful database query tool that provides many convenient methods, including aggregate functions. We can use Laravel's Query Builder to quickly perform sum operations on database data. The following is a simple example:

$total = DB::table('orders')->sum('price');

In the above code, we specify the data table to be queried through the DB::table() method, and then use sum() Method sums prices. Finally, assign the summation result to the variable $total.

Method 2: Using Model

In addition to using Query Builder, we can also use the Model class to query and operate data. In Laravel, each data table usually corresponds to a Model class, and this class already contains some common methods by default, such as find(), all(), where() etc.

The following is an example of using Model to sum:

In the corresponding Model class, we add a getTotalPrice() method to query orders Sum of prices in the table:

public function getTotalPrice()
{
    return $this->sum('price');
}

Then, in our controller, we can call this method through the following code:

$total = Order::getTotalPrice();

In the above code, Order is the name of our Model class. The sum of the prices in the orders table is obtained through the getTotalPrice() method, and assigned to the variable $total.

Method 3: Use raw SQL

Although Query Builder and Model both provide very convenient and flexible data manipulation methods, in some special cases, we may need to use raw SQL statements to complete data operations.

The following is an example of using raw SQL to sum:

$total = DB::select("SELECT SUM(price) FROM orders")[0]->total;

In the above code, we use native SQL statements to sum the prices in the orders table To seek peace. Then use Laravel's DB class to execute the SQL statement and store the result in the variable $total.

Summary

There are multiple ways to sum in Laravel, each with their own pros and cons. Using methods such as Query Builder and Model can greatly simplify the code and make it more convenient and controllable. Using raw SQL allows developers to gain a higher degree of freedom and flexibility. In actual development, we should choose the appropriate method to complete the corresponding summing operation according to the specific situation.

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