CREATE INDEX tbl_A_idx0 ON tbl_A (id) ;
CREATE INDEX tbl_A_idx1 ON tbl_A ( ( tbl_A )::text) ;

CREATE INDEX tbl_B_idx0 ON tbl_B (id) ;
CREATE INDEX tbl_B_idx1 ON tbl_B ( ( tbl_B )::text) ;

SELECT
( tbl_A)::text = ( tbl_B)::text

FROM tbl_A a
JOIN tbl_B b
ON a.ID = b.ID
AND ( tbl_A)::text ( tbl_B)::text ;

(a more exotic approach, creating a data type … you have to ensure that tbl_A & tbl_B are both of type tbl_AB_type )

CREATE TYPE tbl_AB_type ( id int, fld1 bigint, fld2 text ) ;
CREATE INDEX tbl_A_idx1 ON tbl_A ( ( tbl_A )::tbl_AB_type ) ;
CREATE INDEX tbl_B_idx1 ON tbl_B ( ( tbl_B )::tbl_AB_type ) ;

SELECT
( tbl_A)::tbl_AB_type = ( tbl_B)::tbl_AB_type as _bool
, ( tbl_A) AS _row_A
, ( tbl_B) AS _row_B
INTO TEMP TABLE _tmp_tbl
FROM tbl_A a
JOIN tbl_B b
ON a.ID = b.ID
AND ( tbl_A)::tbl_AB_type ( tbl_B)::tbl_AB_type ;

SELECT (_row_A).id, (_row_B).fld1
FROM _tmp_tbl
WHERE ( _row_A) = (_row_B) ;

… and so on …

Thanks for your post. I have one quick question here.

I want to check difference between two tables from two different database like dev and prod.

and if difference found from dev then update same to prod.
only structure not data.

Please help me with suitable solution and query.

Table 2
a = 5
b = 2
c= 3

If I wanted to write a query that told me that A in Table 1 is not the same value as A in Table 2, how would I got about it?