How we can delete record of a table when record of another table deleted using function,trigger in postgresql -concepts?

Use "ON DELETE CASCADE" on the column definition. Something like this will do what you want: CREATE TABLE shopping_carts ( id SERIAL PRIMARY KEY ,cart_name varchar NOT NULL ); CREATE TABLE cart_items ( id SERIAL PRIMARY KEY ,cart_id INT REFERENCES shopping_carts(id) ON DELETE CASCADE ,item_description varchar NOT NULL).

Add a foreign key constraint then use a cascading delete (assuming this exists in postgresql, I don't know).

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