Fix.

Author: dsevilla

sql/sesion1.ipynb

@@ -1210,6 +1210,7 @@
    "outputs": [],
    "source": [
     "# Calcular la suma de posts cada Tag de manera eficiente\n",
+    "import re\n",
     "\n",
     "# Obtener los datos iniciales de los Tags\n",
     "results = %sql SELECT Id, Tags FROM Posts where Tags IS NOT NULL;\n",