diff --git a/server/.env.example b/server/.env.example
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+++ b/server/.env.example
@@ -0,0 +1 @@
+DATABASE_URI="sqlite:///database.db"
\ No newline at end of file
diff --git a/server/.gitignore b/server/.gitignore
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+++ b/server/.gitignore
@@ -0,0 +1,3 @@
+.venv/
+.env
+database.db
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diff --git a/server/README.md b/server/README.md
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+++ b/server/README.md
@@ -0,0 +1,14 @@
+# Run
+```
+fastapi dev main.py
+```
+
+# Best Practice
+## Simple Boilerplate
+https://github.com/anthonycepeda/fastapi-sqlmodel/tree/main
+
+## Global Boilerplate
+https://github.com/zhanymkanov/fastapi-best-practices?tab=readme-ov-file#excessively-use-pydantic
+
+## SQLEModel-boilerplate
+https://github.com/benavlabs/SQLModel-boilerplate/tree/main
diff --git a/server/requirements.txt b/server/requirements.txt
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+++ b/server/requirements.txt
@@ -0,0 +1,3 @@
+fastapi==0.128.6
+sqlmodel==0.0.32
+python-dotenv==1.2.1
\ No newline at end of file
diff --git a/server/src/__init__.py b/server/src/__init__.py
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diff --git a/server/src/__pycache__/app.cpython-311.pyc b/server/src/__pycache__/app.cpython-311.pyc
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diff --git a/server/src/__pycache__/database.cpython-311.pyc b/server/src/__pycache__/database.cpython-311.pyc
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diff --git a/server/src/__pycache__/main.cpython-311.pyc b/server/src/__pycache__/main.cpython-311.pyc
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diff --git a/server/src/app.py b/server/src/app.py
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+++ b/server/src/app.py
@@ -0,0 +1,27 @@
+from contextlib import asynccontextmanager
+from fastapi import FastAPI
+
+from src.database import create_db_and_tables
+#TODO : best practice to manage models import
+from src.questions.models import Question
+from src.knowledges.models import Knowledge
+from src.metrics.models import Metric
+
+#Test
+from src.questions.controller import create_question, read_question
+from src.knowledges.controller import create_knowledge, read_knowledges, delete_knowledge
+
+#TODO : alternative @app.on_event("startup") ?
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    #startup
+    create_db_and_tables()
+    delete_knowledge()
+    yield
+    #shutdown
+
+app = FastAPI(lifespan=lifespan)
+
+@app.get("/")
+async def root():
+    return {"message": "Hello World"}
\ No newline at end of file
diff --git a/server/src/database.py b/server/src/database.py
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+++ b/server/src/database.py
@@ -0,0 +1,17 @@
+from dotenv import load_dotenv
+import os
+#import secrets
+from sqlmodel import Session, SQLModel, create_engine
+
+load_dotenv()
+database_uri=os.environ.get("DATABASE_URI")
+
+connect_args = {"check_same_thread": False}
+engine = create_engine(database_uri, echo=True, connect_args=connect_args)
+
+def create_db_and_tables():
+    SQLModel.metadata.create_all(engine)
+
+def get_session():
+    with Session(engine) as session:
+        yield session
\ No newline at end of file
diff --git a/server/src/knowledges/__pycache__/controller.cpython-311.pyc b/server/src/knowledges/__pycache__/controller.cpython-311.pyc
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diff --git a/server/src/knowledges/__pycache__/crud.cpython-311.pyc b/server/src/knowledges/__pycache__/crud.cpython-311.pyc
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diff --git a/server/src/knowledges/__pycache__/cruds.cpython-311.pyc b/server/src/knowledges/__pycache__/cruds.cpython-311.pyc
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diff --git a/server/src/knowledges/__pycache__/models.cpython-311.pyc b/server/src/knowledges/__pycache__/models.cpython-311.pyc
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diff --git a/server/src/knowledges/controller.py b/server/src/knowledges/controller.py
new file mode 100644
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--- /dev/null
+++ b/server/src/knowledges/controller.py
@@ -0,0 +1,19 @@
+from src.knowledges.models import Knowledge
+from src.knowledges.crud import create_knowledge as create_knowledge_model, read_knowledges as read_knowledges_model, read_knowledge as read_knowledge_model, update_knowledge as update_knowledge_model, delete_knowledge as delete_knowledge_model
+
+def create_knowledge():
+    connaissance = Knowledge(content="La connaissance n'est pas.", uri="https://perdu.fr")
+    create_knowledge_model(connaissance)
+    return read_knowledges()[-1]
+
+def read_knowledges():
+    return read_knowledges_model()
+
+def read_knowledge(knowledge_id):
+    return read_knowledge_model(knowledge_id)
+
+def update_knowledge():
+    return update_knowledge_model(2, "faculté mentale produisant une assimilation par l'esprit d'un contenu objectif préalablement traduit en signes et en idées ;", "https://fr.wikipedia.org/wiki/Connaissance#D%C3%A9finition")
+
+def delete_knowledge():
+    return delete_knowledge_model(7)
diff --git a/server/src/knowledges/crud.py b/server/src/knowledges/crud.py
new file mode 100644
index 0000000..d0d2e57
--- /dev/null
+++ b/server/src/knowledges/crud.py
@@ -0,0 +1,42 @@
+from sqlmodel import Session, select
+
+from src.knowledges.models import Knowledge
+from src.database import engine
+
+def create_knowledge(knowledge: Knowledge):
+    with Session(engine) as session:
+        session.add(knowledge)
+        session.commit()
+
+def read_knowledges():
+    with Session(engine) as session:
+        statement = select(Knowledge)
+        results = session.exec(statement)
+        knowledges = results.all()
+    return knowledges
+
+def read_knowledge(knowledge_id: int):
+    with Session(engine) as session:
+        #statement = select(Knowledge).where(Knowledge.id == knowledge_id)
+        #results = session.exec(statement)
+        #knowledge = results.first()
+        knowledge = session.get(Knowledge, knowledge_id)
+    return knowledge
+
+#TODO adapt logic with args
+def update_knowledge(knowledge_id: int, content: str, uri: str):
+    with Session(engine) as session:
+        knowledge = session.get(Knowledge, knowledge_id)
+        knowledge.content = content if content else knowledge.content
+        knowledge.uri = uri if uri else knowledge.uri 
+        
+        session.add(knowledge)
+        session.commit()
+        session.refresh(knowledge)
+
+def delete_knowledge(knowledge_id: int):
+    with Session(engine) as session:
+        knowledge = session.get(Knowledge, knowledge_id)
+        session.delete(knowledge)
+        session.commit()
+        #TODO : delete join questions
\ No newline at end of file
diff --git a/server/src/knowledges/models.py b/server/src/knowledges/models.py
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--- /dev/null
+++ b/server/src/knowledges/models.py
@@ -0,0 +1,9 @@
+from sqlmodel import Field, SQLModel, Relationship
+#TODO : add pydantic validation
+
+class Knowledge(SQLModel, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+    content: str = Field(index=True)
+    uri: str = Field(index=True)
+
+    questions: list["Question"] = Relationship(back_populates="knowledge", cascade_delete=True) # type: ignore
\ No newline at end of file
diff --git a/server/src/knowledges/router.py b/server/src/knowledges/router.py
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diff --git a/server/src/metrics/__pycache__/models.cpython-311.pyc b/server/src/metrics/__pycache__/models.cpython-311.pyc
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diff --git a/server/src/metrics/crud.py b/server/src/metrics/crud.py
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index 0000000..6077527
--- /dev/null
+++ b/server/src/metrics/crud.py
@@ -0,0 +1,29 @@
+from sqlmodel import Session, select
+
+from src.metrics.models import Metric
+from src.questions.models import Question
+from src.database import engine
+
+def create_metric(Metric: Metric):
+    with Session(engine) as session:
+        session.add(Metric)
+        session.commit()
+
+        
+def read_metrics(question):
+    with Session(engine) as session:
+        statement = select(Metric).where(Metric.question_id == question.id)
+        results = session.exec(statement)
+        metrics = results.all()
+    return metrics
+
+def read_metric(metric_id: int):
+    with Session(engine) as session:
+        metric = session.get(Metric, metric_id)
+    return metric
+
+def delete_metric(metric_id: int):
+    with Session(engine) as session:
+        metric = session.get(Metric, metric_id)
+        session.delete(metric)
+        session.commit()
diff --git a/server/src/metrics/models.py b/server/src/metrics/models.py
new file mode 100644
index 0000000..fdafd4f
--- /dev/null
+++ b/server/src/metrics/models.py
@@ -0,0 +1,7 @@
+from sqlmodel import Field, SQLModel
+#TODO : add pydantic validation
+
+class Metric(SQLModel, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+    question_id: int | None = Field(default=None, foreign_key="question.id", ondelete="CASCADE")
+    need_index: int
diff --git a/server/src/metrics/router.py b/server/src/metrics/router.py
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diff --git a/server/src/questions/__pycache__/models.cpython-311.pyc b/server/src/questions/__pycache__/models.cpython-311.pyc
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diff --git a/server/src/questions/controller.py b/server/src/questions/controller.py
new file mode 100644
index 0000000..70e0aa6
--- /dev/null
+++ b/server/src/questions/controller.py
@@ -0,0 +1,13 @@
+from src.questions.models import Question
+from src.questions.crud import create_question as create_question_model, read_questions as read_questions_model, read_question as read_question_model
+from src.knowledges.models import Knowledge
+
+def create_question(knowledge: Knowledge):
+    question = Question(knowledge = knowledge, question = "Quel est le sens du mot connaissance ?")
+    create_question_model(question)
+
+def read_questions(knowledge):
+    return read_questions_model(knowledge)
+
+def read_question(question_id):
+    return read_question_model(question_id)
\ No newline at end of file
diff --git a/server/src/questions/crud.py b/server/src/questions/crud.py
new file mode 100644
index 0000000..0eae63d
--- /dev/null
+++ b/server/src/questions/crud.py
@@ -0,0 +1,42 @@
+from sqlmodel import Session, select
+
+from src.questions.models import Question
+from src.knowledges.models import Knowledge
+from src.database import engine
+
+def create_question(Question: Question):
+    with Session(engine) as session:
+        session.add(Question)
+        session.commit()
+
+        
+def read_questions(knowledge):
+    with Session(engine) as session:
+        statement = select(Question).where(Question.knowledge_id == knowledge.id)
+        results = session.exec(statement)
+        questions = results.all()
+    return questions
+
+def read_question(question_id: int):
+    with Session(engine) as session:
+        question = session.get(Question, question_id)
+    return question
+
+# #TODO adapt logic with args
+# def update_question(question_id: int, content: str, uri: str):
+#     with Session(engine) as session:
+#         question = session.get(Question, question_id)
+#         question.content = content if content else question.content
+#         question.uri = uri if uri else question.uri 
+        
+#         session.add(question)
+#         session.commit()
+#         session.refresh(question)
+
+#TODO : test
+def delete_question(question_id: int):
+    with Session(engine) as session:
+        question = session.get(Question, question_id)
+        session.delete(question)
+        session.commit()
+
diff --git a/server/src/questions/models.py b/server/src/questions/models.py
new file mode 100644
index 0000000..923ebe7
--- /dev/null
+++ b/server/src/questions/models.py
@@ -0,0 +1,12 @@
+from sqlmodel import Field, SQLModel, Relationship
+from src.knowledges.models import Knowledge
+#TODO : add pydantic validation
+
+class Question(SQLModel, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+    question:str
+
+    knowledge_id: int | None = Field(default=None, foreign_key="knowledge.id", ondelete="CASCADE")
+    knowledge: Knowledge | None =  Relationship(back_populates="questions")
+
+    metrics: list["Metrics"] = Relationship(back_populates="question", cascade_delete=True) # type: ignore
diff --git a/server/src/questions/router.py b/server/src/questions/router.py
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diff --git a/server/src/questions/service.py b/server/src/questions/service.py
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diff --git a/server/src/questions/utils.py b/server/src/questions/utils.py
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