Question

I need to insert a row into a table, with one field value being calculated from another table. Rather than doing two queries and risking a race condition, I thought it’d be better to do it all in one statement.

INSERT INTO `myTable` (`someData`, `averageAtThisTime`) VALUES (     'some stuff',     SELECT AVG(`myField`) FROM `myOtherTable` ) 

… but this doesn’t work. Is there a way I can achieve this in one statement? If not, what’s your recommendation?

Answer 1

INSERT INTO `myTable` (`someData`, `averageAtThisTime`) select 'some stuff', AVG(`myField`)  FROM `myOtherTable`