diff --git a/crates/core/src/database/auth.rs b/crates/core/src/database/auth.rs
index cee3713..c5f77cb 100644
--- a/crates/core/src/database/auth.rs
+++ b/crates/core/src/database/auth.rs
@@ -21,8 +21,8 @@ impl DataManager {
         #[cfg(feature = "postgres")] x: &Row,
     ) -> User {
         User {
-            id: get!(x->0(u64)) as usize,
-            created: get!(x->1(u64)) as usize,
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
             username: get!(x->2(String)),
             password: get!(x->3(String)),
             salt: get!(x->4(String)),
@@ -87,7 +87,7 @@ impl DataManager {
 
         let res = execute!(
             &conn,
-            "INSERT INTO users VALUES ($1, $2, $3, $4, $5, $6, $7, $8)",
+            "INSERT INTO users VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)",
             &[
                 &data.id.to_string().as_str(),
                 &data.created.to_string().as_str(),
@@ -96,7 +96,8 @@ impl DataManager {
                 &data.salt.as_str(),
                 &serde_json::to_string(&data.settings).unwrap().as_str(),
                 &serde_json::to_string(&data.tokens).unwrap().as_str(),
-                &(FinePermission::DEFAULT.bits()).to_string().as_str()
+                &(FinePermission::DEFAULT.bits()).to_string().as_str(),
+                &0.to_string().as_str()
             ]
         );
 
@@ -138,4 +139,7 @@ impl DataManager {
     }
 
     auto_method!(update_user_tokens(Vec<Token>) -> "UPDATE users SET tokens = $1 WHERE id = $2" --serde --cache-key-tmpl="atto.user:{}");
+
+    auto_method!(incr_user_notifications() -> "UPDATE users SET notification_count = notification_count + 1 WHERE id = $1" --cache-key-tmpl="atto.user:{}" --reactions-key-tmpl="atto.user.notification_count:{}" --incr);
+    auto_method!(decr_user_notifications() -> "UPDATE users SET notification_count = notification_count - 1 WHERE id = $1" --cache-key-tmpl="atto.user:{}" --reactions-key-tmpl="atto.user.notification_count:{}" --decr);
 }
diff --git a/crates/core/src/database/common.rs b/crates/core/src/database/common.rs
index 100bf22..9356840 100644
--- a/crates/core/src/database/common.rs
+++ b/crates/core/src/database/common.rs
@@ -13,11 +13,12 @@ impl DataManager {
             Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
         };
 
-        execute!(&conn, common::CREATE_TABLE_USERS, []).unwrap();
-        execute!(&conn, common::CREATE_TABLE_PAGES, []).unwrap();
-        execute!(&conn, common::CREATE_TABLE_ENTRIES, []).unwrap();
-        execute!(&conn, common::CREATE_TABLE_MEMBERSHIPS, []).unwrap();
-        execute!(&conn, common::CREATE_TABLE_REACTIONS, []).unwrap();
+        execute!(&conn, common::CREATE_TABLE_USERS).unwrap();
+        execute!(&conn, common::CREATE_TABLE_PAGES).unwrap();
+        execute!(&conn, common::CREATE_TABLE_ENTRIES).unwrap();
+        execute!(&conn, common::CREATE_TABLE_MEMBERSHIPS).unwrap();
+        execute!(&conn, common::CREATE_TABLE_REACTIONS).unwrap();
+        execute!(&conn, common::CREATE_TABLE_NOTIFICATIONS).unwrap();
 
         Ok(())
     }
@@ -32,7 +33,9 @@ macro_rules! auto_method {
                 Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
             };
 
-            let res = query_row!(&conn, $query, &[&id], |x| { Ok(Self::$select_fn(x)) });
+            let res = query_row!(&conn, $query, &[&(id as i64)], |x| {
+                Ok(Self::$select_fn(x))
+            });
 
             if res.is_err() {
                 return Err(Error::GeneralNotFound($name_.to_string()));
@@ -49,7 +52,9 @@ macro_rules! auto_method {
                 Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
             };
 
-            let res = query_row!(&conn, $query, &[&id], |x| { Ok(Self::$select_fn(x)) });
+            let res = query_row!(&conn, $query, &[&(id as i64)], |x| {
+                Ok(Self::$select_fn(x))
+            });
 
             if res.is_err() {
                 return Err(Error::GeneralNotFound($name_.to_string()));
diff --git a/crates/core/src/database/drivers/common.rs b/crates/core/src/database/drivers/common.rs
index d638b5d..787224a 100644
--- a/crates/core/src/database/drivers/common.rs
+++ b/crates/core/src/database/drivers/common.rs
@@ -3,3 +3,4 @@ pub const CREATE_TABLE_PAGES: &str = include_str!("./sql/create_pages.sql");
 pub const CREATE_TABLE_ENTRIES: &str = include_str!("./sql/create_entries.sql");
 pub const CREATE_TABLE_MEMBERSHIPS: &str = include_str!("./sql/create_memberships.sql");
 pub const CREATE_TABLE_REACTIONS: &str = include_str!("./sql/create_reactions.sql");
+pub const CREATE_TABLE_NOTIFICATIONS: &str = include_str!("./sql/create_notifications.sql");
diff --git a/crates/core/src/database/drivers/postgres.rs b/crates/core/src/database/drivers/postgres.rs
index bdd0e00..369b692 100644
--- a/crates/core/src/database/drivers/postgres.rs
+++ b/crates/core/src/database/drivers/postgres.rs
@@ -10,6 +10,7 @@ use bb8_postgres::{
     PostgresConnectionManager,
     bb8::{Pool, PooledConnection},
 };
+use std::collections::HashMap;
 use tetratto_l10n::{LangFile, read_langs};
 use tokio_postgres::{Config as PgConfig, NoTls, Row, types::ToSql};
 
@@ -91,6 +92,38 @@ macro_rules! query_row {
     };
 }
 
+pub async fn query_rows_helper<T, F>(
+    conn: &Connection<'_>,
+    sql: &str,
+    params: &[&(dyn ToSql + Sync)],
+    mut f: F,
+) -> Result<Vec<T>>
+where
+    F: FnMut(&Row) -> T,
+{
+    let query = conn.prepare(sql).await.unwrap();
+    let res = conn.query(&query, params).await;
+
+    if let Ok(rows) = res {
+        let mut out = Vec::new();
+
+        for row in rows {
+            out.push(f(&row));
+        }
+
+        return Ok(out);
+    } else {
+        Err(res.unwrap_err())
+    }
+}
+
+#[macro_export]
+macro_rules! query_rows {
+    ($conn:expr, $sql:expr, $params:expr, $f:expr) => {
+        crate::database::query_rows_helper($conn, $sql, $params, $f).await
+    };
+}
+
 pub async fn execute_helper(
     conn: &Connection<'_>,
     sql: &str,
@@ -106,4 +139,8 @@ macro_rules! execute {
     ($conn:expr, $sql:expr, $params:expr) => {
         crate::database::execute_helper($conn, $sql, $params).await
     };
+
+    ($conn:expr, $sql:expr) => {
+        crate::database::execute_helper($conn, $sql, &[]).await
+    };
 }
diff --git a/crates/core/src/database/drivers/sql/create_notifications.sql b/crates/core/src/database/drivers/sql/create_notifications.sql
new file mode 100644
index 0000000..7be3b27
--- /dev/null
+++ b/crates/core/src/database/drivers/sql/create_notifications.sql
@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS notifications (
+    id INTEGER NOT NULL PRIMARY KEY,
+    created INTEGER NOT NULL,
+    title TEXT NOT NULL,
+    content TEXT NOT NULL,
+    owner INTEGER NOT NULL
+)
diff --git a/crates/core/src/database/drivers/sql/create_users.sql b/crates/core/src/database/drivers/sql/create_users.sql
index 2b7420e..59c1b0f 100644
--- a/crates/core/src/database/drivers/sql/create_users.sql
+++ b/crates/core/src/database/drivers/sql/create_users.sql
@@ -6,5 +6,7 @@ CREATE TABLE IF NOT EXISTS users (
     salt TEXT NOT NULL,
     settings TEXT NOT NULL,
     tokens TEXT NOT NULL,
-    permissions INTEGER NOT NULL
+    permissions INTEGER NOT NULL,
+    -- counts
+    notification_count INTEGER NOT NULL
 )
diff --git a/crates/core/src/database/drivers/sqlite.rs b/crates/core/src/database/drivers/sqlite.rs
index b117387..7fd8b85 100644
--- a/crates/core/src/database/drivers/sqlite.rs
+++ b/crates/core/src/database/drivers/sqlite.rs
@@ -42,7 +42,6 @@ impl DataManager {
     }
 }
 
-#[cfg(feature = "sqlite")]
 #[macro_export]
 macro_rules! get {
     ($row:ident->$idx:literal($t:tt)) => {
@@ -58,9 +57,32 @@ macro_rules! query_row {
     }};
 }
 
+#[macro_export]
+macro_rules! query_rows {
+    ($conn:expr, $sql:expr, $params:expr, $f:expr) => {{
+        let mut query = $conn.prepare($sql).unwrap();
+
+        if let Ok(mut rows) = query.query($params) {
+            let mut out = Vec::new();
+
+            while let Some(row) = rows.next().unwrap() {
+                out.push($f(&row));
+            }
+
+            Ok(out)
+        } else {
+            Err(Error::Unknown)
+        }
+    }};
+}
+
 #[macro_export]
 macro_rules! execute {
     ($conn:expr, $sql:expr, $params:expr) => {
         $conn.prepare($sql).unwrap().execute($params)
     };
+
+    ($conn:expr, $sql:expr) => {
+        $conn.prepare($sql).unwrap().execute(())
+    };
 }
diff --git a/crates/core/src/database/entries.rs b/crates/core/src/database/entries.rs
index f08bd33..5666a53 100644
--- a/crates/core/src/database/entries.rs
+++ b/crates/core/src/database/entries.rs
@@ -20,11 +20,11 @@ impl DataManager {
         #[cfg(feature = "postgres")] x: &Row,
     ) -> JournalEntry {
         JournalEntry {
-            id: get!(x->0(u64)) as usize,
-            created: get!(x->1(u64)) as usize,
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
             content: get!(x->2(String)),
-            owner: get!(x->3(u64)) as usize,
-            journal: get!(x->4(u64)) as usize,
+            owner: get!(x->3(i64)) as usize,
+            journal: get!(x->4(i64)) as usize,
             context: serde_json::from_str(&get!(x->5(String))).unwrap(),
             // likes
             likes: get!(x->6(i64)) as isize,
diff --git a/crates/core/src/database/memberships.rs b/crates/core/src/database/memberships.rs
index 8cc7149..59557dc 100644
--- a/crates/core/src/database/memberships.rs
+++ b/crates/core/src/database/memberships.rs
@@ -19,10 +19,10 @@ impl DataManager {
         #[cfg(feature = "postgres")] x: &Row,
     ) -> JournalPageMembership {
         JournalPageMembership {
-            id: get!(x->0(u64)) as usize,
-            created: get!(x->1(u64)) as usize,
-            owner: get!(x->2(u64)) as usize,
-            journal: get!(x->3(u64)) as usize,
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
+            owner: get!(x->2(i64)) as usize,
+            journal: get!(x->3(i64)) as usize,
             role: JournalPermission::from_bits(get!(x->4(u32))).unwrap(),
         }
     }
@@ -43,7 +43,7 @@ impl DataManager {
         let res = query_row!(
             &conn,
             "SELECT * FROM memberships WHERE owner = $1 AND journal = $2",
-            &[&owner, &journal],
+            &[&(owner as i64), &(journal as i64)],
             |x| { Ok(Self::get_membership_from_row(x)) }
         );
 
diff --git a/crates/core/src/database/mod.rs b/crates/core/src/database/mod.rs
index dc02fcd..8527943 100644
--- a/crates/core/src/database/mod.rs
+++ b/crates/core/src/database/mod.rs
@@ -3,6 +3,7 @@ mod common;
 mod drivers;
 mod entries;
 mod memberships;
+mod notifications;
 mod pages;
 mod reactions;
 
diff --git a/crates/core/src/database/notifications.rs b/crates/core/src/database/notifications.rs
new file mode 100644
index 0000000..3ba8f39
--- /dev/null
+++ b/crates/core/src/database/notifications.rs
@@ -0,0 +1,117 @@
+use super::*;
+use crate::cache::Cache;
+use crate::model::{Error, Result, auth::Notification, auth::User, permissions::FinePermission};
+use crate::{auto_method, execute, get, query_row, query_rows};
+
+#[cfg(feature = "sqlite")]
+use rusqlite::Row;
+
+#[cfg(feature = "postgres")]
+use tokio_postgres::Row;
+
+impl DataManager {
+    /// Get a [`Reaction`] from an SQL row.
+    pub(crate) fn get_notification_from_row(
+        #[cfg(feature = "sqlite")] x: &Row<'_>,
+        #[cfg(feature = "postgres")] x: &Row,
+    ) -> Notification {
+        Notification {
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
+            title: get!(x->2(String)),
+            content: get!(x->3(String)),
+            owner: get!(x->4(i64)) as usize,
+        }
+    }
+
+    auto_method!(get_notification_by_id()@get_notification_from_row -> "SELECT * FROM notifications WHERE id = $1" --name="notification" --returns=Notification --cache-key-tmpl="atto.notification:{}");
+
+    /// Get a reaction by `owner` and `asset`.
+    pub async fn get_notifications_by_owner(&self, owner: usize) -> Result<Vec<Notification>> {
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = query_rows!(
+            &conn,
+            "SELECT * FROM notifications WHERE owner = $1",
+            &[&(owner as i64)],
+            |x| { Self::get_notification_from_row(x) }
+        );
+
+        if res.is_err() {
+            return Err(Error::GeneralNotFound("reactions".to_string()));
+        }
+
+        Ok(res.unwrap())
+    }
+
+    /// Create a new notification in the database.
+    ///
+    /// # Arguments
+    /// * `data` - a mock [`Reaction`] object to insert
+    pub async fn create_notification(&self, data: Notification) -> Result<()> {
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = execute!(
+            &conn,
+            "INSERT INTO reactions VALUES ($1, $2, $3, $4, $5)",
+            &[
+                &data.id.to_string().as_str(),
+                &data.created.to_string().as_str(),
+                &data.title.to_string().as_str(),
+                &data.content.to_string().as_str(),
+                &data.owner.to_string().as_str()
+            ]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        // incr notification count
+        self.incr_user_notifications(data.owner).await.unwrap();
+
+        // return
+        Ok(())
+    }
+
+    pub async fn delete_notification(&self, id: usize, user: User) -> Result<()> {
+        let notification = self.get_notification_by_id(id).await?;
+
+        if user.id != notification.owner {
+            if !user.permissions.check(FinePermission::MANAGE_NOTIFICATIONS) {
+                return Err(Error::NotAllowed);
+            }
+        }
+
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = execute!(
+            &conn,
+            "DELETE FROM notification WHERE id = $1",
+            &[&id.to_string()]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        self.2.remove(format!("atto.notification:{}", id)).await;
+
+        // decr notification count
+        // self.decr_user_notifications(notification.owner)
+        //     .await
+        //     .unwrap();
+
+        // return
+        Ok(())
+    }
+}
diff --git a/crates/core/src/database/pages.rs b/crates/core/src/database/pages.rs
index 8748444..ba62181 100644
--- a/crates/core/src/database/pages.rs
+++ b/crates/core/src/database/pages.rs
@@ -24,11 +24,11 @@ impl DataManager {
         #[cfg(feature = "postgres")] x: &Row,
     ) -> JournalPage {
         JournalPage {
-            id: get!(x->0(u64)) as usize,
-            created: get!(x->1(u64)) as usize,
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
             title: get!(x->2(String)),
             prompt: get!(x->3(String)),
-            owner: get!(x->4(u64)) as usize,
+            owner: get!(x->4(i64)) as usize,
             read_access: serde_json::from_str(&get!(x->5(String)).to_string()).unwrap(),
             write_access: serde_json::from_str(&get!(x->6(String)).to_string()).unwrap(),
             // likes
diff --git a/crates/core/src/database/reactions.rs b/crates/core/src/database/reactions.rs
index f196c51..3b9227a 100644
--- a/crates/core/src/database/reactions.rs
+++ b/crates/core/src/database/reactions.rs
@@ -1,7 +1,11 @@
 use super::*;
 use crate::cache::Cache;
-use crate::model::reactions::AssetType;
-use crate::model::{Error, Result, auth::User, permissions::FinePermission, reactions::Reaction};
+use crate::model::{
+    Error, Result,
+    auth::User,
+    permissions::FinePermission,
+    reactions::{AssetType, Reaction},
+};
 use crate::{auto_method, execute, get, query_row};
 
 #[cfg(feature = "sqlite")]
@@ -17,12 +21,12 @@ impl DataManager {
         #[cfg(feature = "postgres")] x: &Row,
     ) -> Reaction {
         Reaction {
-            id: get!(x->0(u64)) as usize,
-            created: get!(x->1(u64)) as usize,
-            owner: get!(x->2(u64)) as usize,
-            asset: get!(x->3(u64)) as usize,
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
+            owner: get!(x->2(i64)) as usize,
+            asset: get!(x->3(i64)) as usize,
             asset_type: serde_json::from_str(&get!(x->4(String))).unwrap(),
-            is_like: if get!(x->5(u8)) == 1 { true } else { false },
+            is_like: if get!(x->5(i8)) == 1 { true } else { false },
         }
     }
 
@@ -42,7 +46,7 @@ impl DataManager {
         let res = query_row!(
             &conn,
             "SELECT * FROM reactions WHERE owner = $1 AND asset = $2",
-            &[&owner, &asset],
+            &[&(owner as i64), &(asset as i64)],
             |x| { Ok(Self::get_reaction_from_row(x)) }
         );
 
diff --git a/crates/core/src/model/auth.rs b/crates/core/src/model/auth.rs
index 5700325..51501a3 100644
--- a/crates/core/src/model/auth.rs
+++ b/crates/core/src/model/auth.rs
@@ -72,3 +72,28 @@ impl User {
         self.password == hash_salted(against, self.salt.clone())
     }
 }
+
+#[derive(Debug, Serialize)]
+pub struct Notification {
+    pub id: usize,
+    pub created: usize,
+    pub title: String,
+    pub content: String,
+    pub owner: usize,
+}
+
+impl Notification {
+    /// Returns a new [`Notification`].
+    pub fn new(title: String, content: String, owner: usize) -> Self {
+        Self {
+            id: AlmostSnowflake::new(1234567890)
+                .to_string()
+                .parse::<usize>()
+                .unwrap(),
+            created: unix_epoch_timestamp() as usize,
+            title,
+            content,
+            owner,
+        }
+    }
+}