update database INSERT INTO tblOrders (Recipient,Product,Quantity, ) SELECT column1, column2, column3, ... FROM table1 WHERE condition; code example

Example: insert to first table if field A equals field B from a second table using sql

UPDATE Table_1 SET Field_X = (SELECT Field_Y FROM Table_2 WHERE Table_1.Field_A=Table_2.Field_B LIMIT 1)