How Can I Retrieve the Raw SQL Query String from Laravel's Query Builder?

Get the original SQL query string in Laravel query builder

In Laravel's query builder, you can get the raw SQL query string that will be executed. This is useful for debugging or manually executing queries outside the framework.

To get the raw SQL query, just use the toSql() method on the QueryBuilder instance. For example, the following code will return the raw SQL query string for a query that selects all rows from the "users" table:

$sql = DB::table('users')->toSql();

echo $sql; // 输出： "select * from `users`"

Advantages compared to other methods

While it is possible to use event listeners to retrieve the original SQL query, the toSql() approach has several advantages:

• Easier to use, no need for complex event handling.
• Allows you to inspect raw SQL queries at any time during the query building process.
• Works with query builder and Eloquent, providing a consistent way to retrieve raw SQL queries.

Limitations

It should be noted that the toSql() method only returns the SQL query string, it does not actually execute the query. So if you need to execute a query and retrieve the results, you need to use the first() or get() method.

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