SQL INSERT INTO from multiple tables

Question

this is my table 1:

NAME       AGE        SEX        CITY             ID

Clara      22         f          New York         1
Bob        33         m                 


        

Answer 1

Try doing:

INSERT INTO table3(NAME,AGE,SEX,CITY,ID,NUMBER)
SELECT t1.name,t1.age, t1.sex,t1.city,t1.id,t2.number
FROM table1 t1
LEFT JOIN table2 t2 ON t1.id = t2.id

By using LEFT JOIN, this will insert every record from table 1 in table3, and for the ones that match the join condition in table2, it will also insert their number.