diff --git a/database/migrations/202208162308.sql b/database/migrations/202208162308.sql
index 9d549d5..981c7bb 100644
--- a/database/migrations/202208162308.sql
+++ b/database/migrations/202208162308.sql
@@ -5,20 +5,22 @@ CREATE TABLE _tas_info (
 CREATE TABLE tasks (
   id          INTEGER     PRIMARY KEY,
   name        TEXT        NOT NULL,
-  project     TEXT        NULL,
-  link        TEXT        NULL,
-  dir_path    TEXT        NULL,
+  project     TEXT        ,
+  link        TEXT        ,
+  dir_path    TEXT        ,
 
   current     BOOLEAN     NOT NULL DEFAULT false,
 
-  created_at  DATETIME    NOT NULL DEFAULT datetime('now'),
-  finished_at DATETIME    NULL
+  created_at  DATETIME    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  finished_at DATETIME
 );
 
-CREATE VIEW active_tasks AS (
-  SELECT t.*
-  FROM tasks AS t
-  WHERE t.finished_at IS NULL
-  ORDER BY t.created_at
-);
+CREATE VIEW active_tasks
+AS
+SELECT
+  t.*,
+  row_number() OVER (ORDER BY t.created_at) AS idx
+FROM tasks AS t
+WHERE t.finished_at IS NULL
+ORDER BY t.created_at
 ;
diff --git a/database/schema.sql b/database/schema.sql
index 77cda19..981c7bb 100644
--- a/database/schema.sql
+++ b/database/schema.sql
@@ -5,19 +5,22 @@ CREATE TABLE _tas_info (
 CREATE TABLE tasks (
   id          INTEGER     PRIMARY KEY,
   name        TEXT        NOT NULL,
-  project     TEXT        NULL,
-  link        TEXT        NULL,
-  dir_path    TEXT        NULL,
+  project     TEXT        ,
+  link        TEXT        ,
+  dir_path    TEXT        ,
 
   current     BOOLEAN     NOT NULL DEFAULT false,
 
-  created_at  DATETIME    NOT NULL DEFAULT datetime('now'),
-  finished_at DATETIME    NULL
+  created_at  DATETIME    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  finished_at DATETIME
 );
 
-CREATE VIEW active_tasks AS (
-  SELECT t.*
-  FROM tasks AS t
-  WHERE t.finished_at IS NULL
-  ORDER BY t.created_at
-);
+CREATE VIEW active_tasks
+AS
+SELECT
+  t.*,
+  row_number() OVER (ORDER BY t.created_at) AS idx
+FROM tasks AS t
+WHERE t.finished_at IS NULL
+ORDER BY t.created_at
+;
diff --git a/src/repo.rs b/src/repo.rs
index d266e98..c75ec0b 100755
--- a/src/repo.rs
+++ b/src/repo.rs
@@ -28,6 +28,7 @@ pub enum Error {
     NotFound,
     InvalidData,
     InsertData,
+    RemoveData,
 }
 
 impl std::fmt::Display for Error {
@@ -39,6 +40,7 @@ impl std::fmt::Display for Error {
             Error::NotFound => f.write_str("Cannot find data"),
             Error::InvalidData => f.write_str("Invalid data format"),
             Error::InsertData => f.write_str("Cannot insert data"),
+            Error::RemoveData => f.write_str("Cannot remove data"),
         }
     }
 }
diff --git a/src/repo/sqlite.rs b/src/repo/sqlite.rs
index 3846d22..ca2ded5 100644
--- a/src/repo/sqlite.rs
+++ b/src/repo/sqlite.rs
@@ -1,6 +1,6 @@
 use std::path::PathBuf;
 
-use rusqlite::Connection;
+use rusqlite::{Connection, OptionalExtension};
 use xdg::BaseDirectories;
 
 use crate::domain;
@@ -17,6 +17,8 @@ struct Task {
 
     created_at: time::OffsetDateTime,
     finished_at: Option<time::OffsetDateTime>,
+
+    idx: i64,
 }
 
 impl From<Task> for domain::Task {
@@ -43,6 +45,7 @@ impl<'r> TryFrom<&'r rusqlite::Row<'_>> for Task {
             current: row.get("current")?,
             created_at: row.get("created_at")?,
             finished_at: row.get("finished_at")?,
+            idx: row.get("idx")?,
         })
     }
 }
@@ -57,17 +60,53 @@ impl SqliteRepo {
     pub fn new(xdg_dirs: BaseDirectories) -> Result<Self, Error> {
         let file_path = xdg_dirs.get_data_file(SCHEMA_FILE);
         let conn = Connection::open(file_path).map_err(|_| Error::Connect)?;
+
+        /*
+        conn.execute_batch(&format!(
+            "BEGIN; {} COMMIT;",
+            include_str!("../../database/schema.sql")
+        ))
+        .map_err(|err| match err {
+            rusqlite::Error::SqlInputError { .. } => panic!("{}", err),
+            _ => err,
+        })
+        .ok();
+        */
+
         Ok(Self { conn })
     }
 }
 
 impl Repository for SqliteRepo {
     fn get_current_task_opt(&self) -> Result<Option<domain::CurrentTaskInfo>, Error> {
-        todo!()
+        let mut stmt = self
+            .conn
+            .prepare("SELECT * FROM active_tasks WHERE current IS true")
+            .map_err(|_| Error::PrepareQuery)?;
+
+        let row = stmt
+            .query_row([], |row| Task::try_from(row))
+            .optional()
+            .map_err(|_| Error::QueryData)?;
+
+        Ok(row.map(|db_task| domain::CurrentTaskInfo {
+            task_idx: db_task.idx as usize,
+            task: db_task.into(),
+        }))
     }
 
     fn get_task_opt(&self, id: domain::TaskId) -> Result<Option<domain::Task>, Error> {
-        todo!()
+        let mut stmt = self
+            .conn
+            .prepare("SELECT * FROM active_tasks WHERE idx = ?")
+            .map_err(|_| Error::PrepareQuery)?;
+
+        let row = stmt
+            .query_row([id as i64], |row| Task::try_from(row))
+            .optional()
+            .map_err(|_| Error::QueryData)?;
+
+        Ok(row.map(From::from))
     }
 
     fn get_tasks(&self) -> Result<Vec<domain::Task>, Error> {
@@ -87,11 +126,40 @@ impl Repository for SqliteRepo {
     }
 
     fn remove_task(&self, id: domain::TaskId) -> Result<domain::Task, Error> {
-        todo!()
+        let task = self.get_task_opt(id)?.ok_or(Error::NotFound)?;
+
+        let mut stmt = self
+            .conn
+            .prepare("DELETE FROM tasks WHERE id = ?")
+            .map_err(|_| Error::PrepareQuery)?;
+
+        stmt.execute([&(id as i64)])
+            .map_err(|_| Error::RemoveData)?;
+
+        Ok(task)
     }
 
     fn insert_task(&self, insert_data: super::InsertTaskData) -> Result<domain::Task, Error> {
-        todo!()
+        let mut stmt = self
+            .conn
+            .prepare(
+                "INSERT INTO tasks (name, project, link, dir_path)
+                 VALUES (?1, ?2, ?3, ?4)",
+            )
+            .map_err(|_| Error::PrepareQuery)?;
+
+        let id = stmt
+            .insert((
+                &insert_data.name,
+                &insert_data.project,
+                &insert_data.link,
+                &insert_data
+                    .dir_path
+                    .and_then(|p| p.into_os_string().into_string().ok()),
+            ))
+            .map_err(|_| Error::InsertData)?;
+
+        self.get_task_opt(id as usize)?.ok_or(Error::NotFound)
     }
 
     fn update_task(