diff --git a/README.md b/README.md index 5de7755..eb980c8 100644 --- a/README.md +++ b/README.md @@ -682,7 +682,7 @@ The following guidelines indicate when the use of an index should be reconsidere **- Indexes should not be used on small tables. -Tables that have frequent, large batch updates or insert operations. +**- Tables that have frequent, large batch updates or insert operations. Indexes should not be used on columns that contain a high number of NULL values.