diff --git a/db_compare.py b/db_compare.py
index 968d4c30..49a7ab36 100755
--- a/db_compare.py
+++ b/db_compare.py
@@ -390,7 +390,7 @@ def check_tema():
 	LEFT OUTER JOIN seminar_cisla AS c ON c.id = cislo_zadani_id
 	WHERE typ IN ('tema', 'serial')
 	ORDER BY  seminar_problemy.id"""
-	new_query = """SELECT tema_typ, zad_text.na_web AS text_zadani, res_text.na_web AS text_reseni, rn.rocnik_id AS rocnik_id
+	new_query = """SELECT tema_typ, COALESCE(zad_text.na_web, '') AS text_zadani, COALESCE(res_text.na_web, '') AS text_reseni, rn.rocnik_id AS rocnik_id
 	FROM seminar_temata
 	-- Problém:
 	JOIN seminar_problemy AS problem ON problem_ptr_id = problem.id
@@ -398,15 +398,15 @@ def check_tema():
 	-- TvCNode má dva potomky, oba TextNode. První drží původní text zadání, druhý řešení.
 	INNER JOIN seminar_nodes_temavcisle AS tvcn ON tvcn.tema_id = id
 	INNER JOIN seminar_nodes_treenode AS ttn ON tvcn.treenode_ptr_id = ttn.id
-	INNER JOIN seminar_nodes_treenode AS zad_tn ON ttn.first_child_id = zad_tn.id
-	INNER JOIN seminar_nodes_treenode AS res_tn ON zad_tn.succ_id = res_tn.id
-	INNER JOIN seminar_nodes_obsah AS zad_on ON zad_on.treenode_ptr_id = zad_tn.id
-	INNER JOIN seminar_nodes_obsah AS res_on ON res_on.treenode_ptr_id = res_tn.id
-	INNER JOIN seminar_texty AS zad_text ON zad_on.text_id = zad_text.id
-	INNER JOIN seminar_texty AS res_text ON res_on.text_id = res_text.id
+	LEFT OUTER JOIN seminar_nodes_treenode AS zad_tn ON ttn.first_child_id = zad_tn.id -- jen 33 z nich
+	LEFT OUTER JOIN seminar_nodes_treenode AS res_tn ON zad_tn.succ_id = res_tn.id -- jen 4 z nich  
+	LEFT OUTER JOIN seminar_nodes_obsah AS zad_on ON zad_on.treenode_ptr_id = zad_tn.id
+	LEFT OUTER JOIN seminar_nodes_obsah AS res_on ON res_on.treenode_ptr_id = res_tn.id
+	LEFT OUTER JOIN seminar_texty AS zad_text ON zad_on.text_id = zad_text.id
+	LEFT OUTER JOIN seminar_texty AS res_text ON res_on.text_id = res_text.id -- vsechny 4
 	-- Ročník tématu:
 	-- Podle rootu TvCN
-	INNER JOIN seminar_nodes_rocnik AS rn ON ttn.root_id = rn.treenode_ptr_id
+	LEFT OUTER JOIN seminar_nodes_rocnik AS rn ON ttn.root_id = rn.treenode_ptr_id -- nic
 
 	ORDER BY problem_ptr_id"""
 	same_fields = ['text_zadani', 'text_reseni', 'rocnik_id']