diff --git a/sql/30b_schema_size.sql b/sql/30b_schema_size.sql
new file mode 100644
index 0000000..7fe1142
--- /dev/null
+++ b/sql/30b_schema_size.sql
@@ -0,0 +1,16 @@
+prompt <h2>Taille des objets par schéma (Mo):</h2>
+select
+    ds.owner owner,
+    round(sum(ds.bytes) / 1024 / 1024) "schema size mega",
+    du.default_tablespace "default tablespace"
+from
+    dba_segments ds,
+    dba_users du
+where
+    ds.OWNER = du.USERNAME
+group by
+    ds.owner,
+    du.default_tablespace
+order by
+    ds.owner
+;