diff --git a/reana_db/alembic/versions/20201009_1612_ad93dae04483_interactive_sessions.py b/reana_db/alembic/versions/20201009_1612_ad93dae04483_interactive_sessions.py
new file mode 100644
index 0000000..127fe6f
--- /dev/null
+++ b/reana_db/alembic/versions/20201009_1612_ad93dae04483_interactive_sessions.py
@@ -0,0 +1,103 @@
+"""Interactive sessions.
+
+Revision ID: ad93dae04483
+Revises: c912d4f1e1cc
+Create Date: 2020-10-09 16:12:00.090837
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlalchemy_utils
+
+# revision identifiers, used by Alembic.
+revision = "ad93dae04483"
+down_revision = "c912d4f1e1cc"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    """Upgrade to ad93dae04483 revision."""
+    op.create_table(
+        "interactive_session",
+        sa.Column("created", sa.DateTime(), nullable=False),
+        sa.Column("updated", sa.DateTime(), nullable=False),
+        sa.Column("id_", sqlalchemy_utils.types.uuid.UUIDType(), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=True),
+        sa.Column("path", sa.Text(), nullable=True),
+        sa.Column(
+            "status",
+            sa.Enum(
+                "created",
+                "running",
+                "finished",
+                "failed",
+                "deleted",
+                "stopped",
+                "queued",
+                name="runstatus",
+            ),
+            nullable=False,
+        ),
+        sa.Column("owner_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=True),
+        sa.Column(
+            "type_", sa.Enum("jupyter", name="interactivesessiontype"), nullable=False
+        ),
+        sa.ForeignKeyConstraint(["owner_id"], ["__reana.user_.id_"],),
+        sa.PrimaryKeyConstraint("id_"),
+        sa.UniqueConstraint("id_"),
+        sa.UniqueConstraint("name", "path", name="_interactive_session_uc"),
+        schema="__reana",
+    )
+    op.create_table(
+        "interactive_session_resource",
+        sa.Column("created", sa.DateTime(), nullable=False),
+        sa.Column("updated", sa.DateTime(), nullable=False),
+        sa.Column("session_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=False),
+        sa.Column(
+            "resource_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=False
+        ),
+        sa.Column("quantity_used", sa.BigInteger(), nullable=True),
+        sa.ForeignKeyConstraint(["resource_id"], ["__reana.resource.id_"],),
+        sa.ForeignKeyConstraint(["session_id"], ["__reana.interactive_session.id_"],),
+        sa.PrimaryKeyConstraint("session_id", "resource_id"),
+        schema="__reana",
+    )
+    op.create_table(
+        "workflow_session",
+        sa.Column("workflow_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=True),
+        sa.Column("session_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=False),
+        sa.ForeignKeyConstraint(["session_id"], ["__reana.interactive_session.id_"],),
+        sa.ForeignKeyConstraint(["workflow_id"], ["__reana.workflow.id_"],),
+        sa.PrimaryKeyConstraint("session_id"),
+        schema="__reana",
+    )
+    op.drop_column("workflow", "interactive_session_name", schema="__reana")
+    op.drop_column("workflow", "interactive_session_type", schema="__reana")
+    op.drop_column("workflow", "interactive_session", schema="__reana")
+
+
+def downgrade():
+    """Downgrade to previous revision (none in this case)."""
+    op.add_column(
+        "workflow",
+        sa.Column("interactive_session", sa.TEXT(), autoincrement=False, nullable=True),
+        schema="__reana",
+    )
+    op.add_column(
+        "workflow",
+        sa.Column(
+            "interactive_session_type", sa.TEXT(), autoincrement=False, nullable=True
+        ),
+        schema="__reana",
+    )
+    op.add_column(
+        "workflow",
+        sa.Column(
+            "interactive_session_name", sa.TEXT(), autoincrement=False, nullable=True
+        ),
+        schema="__reana",
+    )
+    op.drop_table("workflow_session", schema="__reana")
+    op.drop_table("interactive_session_resource", schema="__reana")
+    op.drop_table("interactive_session", schema="__reana")
diff --git a/reana_db/models.py b/reana_db/models.py
index 89e0938..1c2a39d 100644
--- a/reana_db/models.py
+++ b/reana_db/models.py
@@ -290,23 +290,20 @@ class JobStatus(enum.Enum):
     queued = 5
 
 
-class UserWorkflowSession(Base, Timestamp):
-    """User Workflow Session table."""
+class WorkflowSession(Base):
+    """Workflow Session table."""
 
-    __tablename__ = "user_workflow_session"
+    __tablename__ = "workflow_session"
     __table_args__ = {"schema": "__reana"}
 
-    user_id = Column(UUIDType, ForeignKey("__reana.user_.id_"), nullable=False)
     workflow_id = Column(UUIDType, ForeignKey("__reana.workflow.id_"), nullable=True)
     session_id = Column(
         UUIDType, ForeignKey("__reana.interactive_session.id_"), primary_key=True
     )
 
     def __repr__(self):
-        """User Workflow Session string representation."""
-        return "<UserWorkflowSession {} {} {}>".format(
-            self.user_id, self.session_id, self.workflow_id
-        )
+        """Workflow Session string representation."""
+        return "<WorkflowSession {} {}>".format(self.session_id, self.workflow_id)
 
 
 class InteractiveSessionType(enum.Enum):
@@ -322,9 +319,7 @@ class InteractiveSession(Base, Timestamp):
     id_ = Column(UUIDType, primary_key=True, unique=True, default=generate_uuid)
     name = Column(String(255))
     path = Column(Text)  # path to access the interactive session
-    status = Column(
-        Enum(RunStatus), nullable=False, default=RunStatus.created
-    )
+    status = Column(Enum(RunStatus), nullable=False, default=RunStatus.created)
     owner_id = Column(UUIDType, ForeignKey("__reana.user_.id_"))
     type_ = Column(
         Enum(InteractiveSessionType),
@@ -374,6 +369,14 @@ class Workflow(Base, Timestamp):
     git_provider = Column(String(255))
     owner = relationship("User", backref="workflow")
 
+    sessions = relationship(
+        "InteractiveSession",
+        secondary="__reana.workflow_session",
+        lazy="dynamic",
+        backref="workflow",
+        cascade="all, delete",
+    )
+
     __table_args__ = (
         UniqueConstraint(
             "name", "owner_id", "run_number", name="_user_workflow_run_uc"
@@ -714,6 +717,25 @@ def __repr__(self):
         return "<WorkflowResource {} {}>".format(self.workflow_id, self.resource_id)
 
 
+class InteractiveSessionResource(Base, Timestamp):
+    """Interactive Session Resource table."""
+
+    __tablename__ = "interactive_session_resource"
+    __table_args__ = {"schema": "__reana"}
+
+    session_id = Column(
+        UUIDType, ForeignKey("__reana.interactive_session.id_"), primary_key=True
+    )
+    resource_id = Column(UUIDType, ForeignKey("__reana.resource.id_"), primary_key=True)
+    quantity_used = Column(BigInteger())
+
+    def __repr__(self):
+        """Interactive Session Resource string representation."""
+        return "<InteractiveSessionResource {} {}>".format(
+            self.session_id, self.resource_id
+        )
+
+
 class QuotaHealth(enum.Enum):
     """Enumeration of quota health statuses."""