Index: /trunk/FACT++/src/fits2sql.cc
===================================================================
--- /trunk/FACT++/src/fits2sql.cc	(revision 19101)
+++ /trunk/FACT++/src/fits2sql.cc	(revision 19102)
@@ -150,5 +150,7 @@
         "This can be avoided using the 'ON DUPLICATE KEY' directive. With the "
         "--duplicate,you can specify what should be updated in case of a duplicate key. "
-        "For detaily, see the MySQL manual.\n"
+        "To keep the row untouched, you can just update the primary key "
+        "with the identical primary key, e.g. --duplicate='MyPrimary=VALUES(MyPrimary)'. "
+        "For more details, see the MySQL manual.\n"
         "\n"
         "For debugging purpose, or to just create or drop a table, the final insert "
Index: /trunk/FACT++/src/root2sql.cc
===================================================================
--- /trunk/FACT++/src/root2sql.cc	(revision 19101)
+++ /trunk/FACT++/src/root2sql.cc	(revision 19102)
@@ -150,5 +150,7 @@
         "This can be avoided using the 'ON DUPLICATE KEY' directive. With the "
         "--duplicate,you can specify what should be updated in case of a duplicate key. "
-        "For detaily, see the MySQL manual.\n"
+        "To keep the row untouched, you can just update the primary key "
+        "with the identical primary key, e.g. --duplicate='MyPrimary=VALUES(MyPrimary)'. "
+        "For more details, see the MySQL manual.\n"
         "\n"
         "For debugging purpose, or to just create or drop a table, the final insert "