Laravel is a popular PHP framework that uses ORM (Object Relational Mapping) when operating databases to help developers complete more efficient tasks. ORM is a technology that connects objects in applications and relational data in databases. The ORM in Laravel makes database operations simple while also improving reusability.

When using Laravel ORM, sometimes you want to alias tables and columns. The aliasing operation maps a table or column name to another name (usually a short and easy-to-remember name). This way we can use more intuitive names in our code. Next, this article will introduce in detail how to get aliases in Laravel ORM.

1. Using AS syntax

In Laravel ORM, we can use AS syntax to add aliases. We can use the following code to get an alias:

DB::table('users')
????->select('name?AS?user_name')'
????->get();

In the above code, we use AS syntax to set the alias "user_name" for the "name" column. In the query results, the value of the "name" column will be mapped to "user_name".

2. Use the selectRaw() method

You can also use the selectRaw() method to perform alias operations on tables and columns. This method allows us to execute raw SQL queries, using any syntax supported by the database. The following is the code for aliasing using the selectRaw() method:

DB::table('users')
????->selectRaw('name?AS?user_name')
????->get();

In the above code, we use the selectRaw() method to execute the original SQL statement. Here, we have set the alias "user_name" for the "name" column using AS syntax.

3. Using the join() method

In Laravel ORM, we can use the join() method to join multiple tables. When joining multiple tables, we can use aliases to reference them. The following is the code for using the join() method for alias operations:

DB::table('users')
????->join('orders',?'users.id',?'=',?'orders.user_id')
????->select('users.*',?'orders.total?AS?order_total')
????->get();

In the above code, we use the join() method to join the "users" and "orders" tables. In the query, we set the "orders.total" column to the "order_total" alias using AS syntax.

4. Using the DB::raw() method

The DB::raw() method allows us to use raw SQL statements in queries. In Laravel ORM, we can use the DB::raw() method to set aliases for tables and columns. The following is the code for using the DB::raw() method for alias operations:

DB::table('users')
????->select(DB::raw('count(*)?AS?user_count'))
????->get();

In the above code, we use the DB::raw() method to execute the original SQL statement. Here we use AS syntax to set "count(*)" to the "user_count" alias.

Summary:

In Laravel ORM, aliasing is very simple. We can use AS syntax, selectRaw() method, join() method and DB::raw() method to perform alias operations . Using aliases makes your code clearer, easier to understand, and easier to maintain. Laravel ORM is very powerful. It can help developers quickly complete database operations, allowing us to only focus on the implementation of business logic.

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