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

3 votes266 views1 answer
Oracle user quota on tablespace
SQL
0 vote283 views1 answer
Fatal error: Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'autos_id' in 'field list' in
SQL
1 vote281 views1 answer
Pentaho + pasar de excel a sql
SQL
0 vote290 views3 answers
Sql query checker
SQL
0 vote232 views1 answer
Java spring boot connect to sql server
SQL
0 vote274 views1 answer
Add colum date in sql
SQL
0 vote280 views1 answer
Mysql select where field like in list
SQL
0 vote250 views1 answer
Linux upload database to mysql
SQL
0 vote267 views1 answer
Mysql xampp reset root password
SQL
3 votes311 views1 answer
How to add unique constraint in mysql table
SQL