Postgres check for foreign key

SELECT
    r.table_name
FROM information_schema.constraint_column_usage       u
INNER JOIN information_schema.referential_constraints fk
           ON u.constraint_catalog = fk.unique_constraint_catalog
               AND u.constraint_schema = fk.unique_constraint_schema
               AND u.constraint_name = fk.unique_constraint_name
INNER JOIN information_schema.key_column_usage        r
           ON r.constraint_catalog = fk.constraint_catalog
               AND r.constraint_schema = fk.constraint_schema
               AND r.constraint_name = fk.constraint_name
WHERE
    u.column_name = 'id' AND
    u.table_catalog = 'db_name' AND
    u.table_schema = 'public' AND
    u.table_name = 'table_a'

Source: stackoverflow.com

Similar codes

1 vote220 views1 answer
Woocommerce mysql price table
SQL
0 vote213 views1 answer
Export partttion and import in oracle
SQL
0 vote215 views1 answer
Mysql workbench indent formatting
SQL
0 vote230 views2 answers
Cambiar nombre tabla mysql
SQL
0 vote226 views1 answer
PDOException: SQLSTATE[HY093]: Invalid parameter numb
SQL
-1 vote255 views3 answers
MAKE TABLE FIT in oracle sql
SQL
0 vote221 views1 answer
Subquery aggregation
SQL
0 vote212 views1 answer
Where case insensitive like mysql
SQL
9 votes222 views3 answers
Show table columns mysql command line
SQL
3 votes207 views1 answer
V$session not found in oracle
SQL