Using insert into … select results in a incorrect syntax near select, why?

Question

How can I make a SELECT inside an INSERT operation?

insert into tableX (a_id, b_id) 
VALUES ((SELECT service_id 
         FROM tableY 
         WHERE id = 10, 2))         


        

Answer 1

In MySQL one can insert dynamic values. Here is the sample:

INSERT INTO Item_Info (`Back_Ground_Color`,) 
VALUES ( (select concat('#',SUBSTRING((lpad(hex(round(rand() * 10000000)),6,0)),-6))));