How do I add specific columns from different tables onto an existing table in postgresql?

Question

I have an original table (TABLE 1):

A	B	C	D
1	3	5	7
2	4	6	8

I want to add column F from the table below (Table 2) onto table 1:

A	F	G	H
1	29	5	7
2	30	6	8

As well as adding Column J,L and O from the table below (Table 3) onto column 1:

A	I	J	K	L	M	N	O
1	9	11	13	15	17	19	21
2	10	12	14	16	18	20	22

How do I go about adding only the specific columns onto table 1?

Expected Result:

A	B	C	D	F	J	L	O
1	3	5	7	29	11	15	21
2	4	6	8	30	12	16	22

Answer 1

Use following query

SELECT T1.A,
       B,
       C,
       D,
       F,
       J,
       L,
       O
FROM   table1 T1
       JOIN table2 T2
         ON T1.A = T2.A
       JOIN table3 t3
         ON T1.A = T3.A