text: # Phone schema
  # 
  #  --- !Ups
  
  CREATE TABLE "public"."phone" (
  "id" serial8 NOT NULL,
  "customer_id" int8 NOT NULL,
  "number" varchar(11) NOT NULL,
  PRIMARY KEY ("id"),
  CONSTRAINT "customer_fk" FOREIGN KEY ("customer_id") REFERENCES "public"."customer" ("id") ON DELETE CASCADE
  )
  
  
  # --- !Downs
  
  DROP TABLE "public".phone