/TypeScript/View all foreign key constraints postgres

View all foreign key constraints postgres

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

View all foreign key constraints postgres

SELECT
    tc.table_schema, 
    tc.constraint_name, 
    tc.table_name, 
    kcu.column_name, 
    ccu.table_schema AS foreign_table_schema,
    ccu.table_name AS foreign_table_name,
    ccu.column_name AS foreign_column_name 
FROM 
    information_schema.table_constraints AS tc 
    JOIN information_schema.key_column_usage AS kcu
      ON tc.constraint_name = kcu.constraint_name
      AND tc.table_schema = kcu.table_schema
    JOIN information_schema.constraint_column_usage AS ccu
      ON ccu.constraint_name = tc.constraint_name
      AND ccu.table_schema = tc.table_schema
WHERE tc.constraint_type = 'FOREIGN KEY' AND tc.table_name='mytable';

Source: stackoverflow.com

Similar codes

0 vote209 views1 answer
Fgets input from user
TypeScript
2 votes217 views2 answers
Print digits of a number in c
TypeScript
2 votes210 views1 answer
UseStae with array of strings typescript
TypeScript
1 vote229 views1 answer
Retrieve data from firebase flutter
TypeScript
0 vote237 views1 answer
Howt o make sure its a valid sudoku in python
TypeScript
0 vote229 views3 answers
Woocommerce remove This is where you can add new products to your store in taxonomy description
TypeScript
4 votes244 views1 answer
Check ports in use docker
TypeScript
0 vote232 views2 answers
Check if a temporary table exists and delete if it exists
TypeScript
0 vote208 views1 answer
View and navigate your assignments (teacher) code for asp.net
TypeScript
0 vote215 views1 answer
Engineering adding requirements to password
TypeScript