diff --git a/backend/sql/1-create_person.sql b/backend/sql/1-create_person.sql
index 8addd66..d655581 100644
--- a/backend/sql/1-create_person.sql
+++ b/backend/sql/1-create_person.sql
@@ -4,15 +4,14 @@
 
 CREATE TABLE IF NOT EXISTS public."Person"
 (
-    id integer NOT NULL DEFAULT nextval('"Person_id_seq"'::regclass),
+    id SERIAL PRIMARY KEY,
     email character varying(128) COLLATE pg_catalog."default" NOT NULL,
     password character varying(128) COLLATE pg_catalog."default" NOT NULL,
     display_name character varying(128) COLLATE pg_catalog."default" NOT NULL,
     date_of_birth date,
     available boolean,
     enabled boolean NOT NULL DEFAULT false,
-    place_of_living character varying(128) COLLATE pg_catalog."default",
-    CONSTRAINT "Person_pkey" PRIMARY KEY (id)
+    place_of_living character varying(128) COLLATE pg_catalog."default"
 )
 
 TABLESPACE pg_default;
diff --git a/backend/sql/2-create_activation_link.sql b/backend/sql/2-create_activation_link.sql
index c766fa1..ad10bd6 100644
--- a/backend/sql/2-create_activation_link.sql
+++ b/backend/sql/2-create_activation_link.sql
@@ -4,9 +4,8 @@
 
 CREATE TABLE IF NOT EXISTS public."ActivationLink"
 (
-    identifier character varying COLLATE pg_catalog."default" NOT NULL,
+    identifier character varying PRIMARY KEY COLLATE pg_catalog."default" ,
     person_id integer NOT NULL,
-    CONSTRAINT "ActivationLink_pkey" PRIMARY KEY (identifier),
     CONSTRAINT "PersonActivationLinkFK" FOREIGN KEY (person_id)
         REFERENCES public."Person" (id) MATCH SIMPLE
         ON UPDATE CASCADE
diff --git a/backend/sql/3-create_organization.sql b/backend/sql/3-create_organization.sql
index 1bad9da..1a97592 100644
--- a/backend/sql/3-create_organization.sql
+++ b/backend/sql/3-create_organization.sql
@@ -4,12 +4,11 @@
 
 CREATE TABLE IF NOT EXISTS public."Organization"
 (
-    id integer NOT NULL DEFAULT nextval('"Organization_id_seq"'::regclass),
+    id SERIAL PRIMARY KEY,
     name character varying(128) COLLATE pg_catalog."default" NOT NULL,
     location character varying COLLATE pg_catalog."default",
     description text COLLATE pg_catalog."default",
-    is_hiring boolean,
-    CONSTRAINT "Organization_pkey" PRIMARY KEY (id)
+    is_hiring boolean
 )
 
 TABLESPACE pg_default;
diff --git a/backend/sql/4-create_organization_post.sql b/backend/sql/4-create_organization_post.sql
index 475c2a2..bd2f762 100644
--- a/backend/sql/4-create_organization_post.sql
+++ b/backend/sql/4-create_organization_post.sql
@@ -4,10 +4,9 @@
 
 CREATE TABLE IF NOT EXISTS public."OrganizationPost"
 (
-    id integer NOT NULL DEFAULT nextval('"OrganizationPost_id_seq"'::regclass),
+    id SERIAL PRIMARY KEY,
     organization_id integer NOT NULL,
     content text COLLATE pg_catalog."default" NOT NULL,
-    CONSTRAINT "OrganizationPost_pkey" PRIMARY KEY (id),
     CONSTRAINT "OrganizationIdFk" FOREIGN KEY (organization_id)
         REFERENCES public."Organization" (id) MATCH SIMPLE
         ON UPDATE CASCADE