Answers for "alter table add foreign key for multiple columns postgresql"

alter table add multiple columns postgresql

ALTER TABLE customer 
ADD COLUMN fax VARCHAR,
ADD COLUMN email VARCHAR;

Posted by: Guest on May-26-2020

postgres foreign key multiple columns

CREATE TABLE t1 (
  a integer PRIMARY KEY,
  b integer,
  c integer,
  FOREIGN KEY (b, c) REFERENCES other_table (c1, c2)
);

Posted by: Guest on February-08-2022

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