Understand MySQ (Oracle) fuzzy query and use instr() instead of like to improve efficiency

                                                       

Everyone knows that the efficiency of like is very low, and it will be very slow if the amount of data is large. Today I discovered a built-in function instr() that is more efficient than like High

• SELECT * FROM msg_list WHERE title LIKE '%涂山%'

  can be replaced with:

• SELECT * FROM msg_list WHERE INSTR(title,'涂山') > 0

The methods used in ThinkPHP/Laravel are:

1. Use whereRaw() to execute native INSTR()
2. Modify the construction query (not recommended, but it is convenient to use)

   项目根目录\thinkphp\library\think\db\Builder.php

   
   

   MsgList::where([
        'title' => ['instr','涂山']])
    ->select();

Related learning recommendations: mysql video tutorial

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