I want to use the function in MySQL like convert(name use gbk).
How can I use this with Laravel's query builder with?
I tried ->orderBy(convert(name using gbk)) but it doesnt work.
You need to use the Raw function of eloquent.
DB::raw(your sql)
In your case, the following query should work:
->orderBy(DB::raw('convert(name using gbk)'))
If you want to use raw sql in your where statements, your can use the shortcut function whereRaw() and for a select the selectRaw() function.
->where('t','<=',DB::raw('now()'));COALESCE(parent_aid, aid), parent_aid` IS NOT NULL` by just placing DB::raw() in orderBy(). It works perfect!