query: Is it ok to store many null values in my table?
positive_passages.docid: 25074
positive_passages.text: NULL in MySQL (Performance & Storage)
negative_passages.docid: 19198
negative_passages.text: Does assigning objects to null in Java impact garbage collection?
negative_passages.docid: 41898
negative_passages.text: Nullable integer in .NET
negative_passages.docid: 32059
negative_passages.text: What is \null and when do we need to use it?
negative_passages.docid: 104501
negative_passages.text: How do I enforce null checking?
negative_passages.docid: 58054
negative_passages.text: When is it OK to catch NullPointerException?
negative_passages.docid: 33176
negative_passages.text: Can I have multiple primary keys in a single table?
negative_passages.docid: 29684
negative_passages.text: How to check if an object is nullable?
negative_passages.docid: 41952
negative_passages.text: Add NOT NULL constraint to large table without table scan
negative_passages.docid: 148619
negative_passages.text: Is there a reason not to use  (null safe equals operator) in mysql instead of =?
negative_passages.docid: 105889
negative_passages.text: PostgreSQL multi-column unique constraint and NULL values
negative_passages.docid: 138022
negative_passages.text: PreparedStatement setNull(..)
negative_passages.docid: 84332
negative_passages.text: Xml serialization - Hide null values
negative_passages.docid: 72088
negative_passages.text: Why shouldn't we allow NULLs?
negative_passages.docid: 115806
negative_passages.text: How to store lots of small text in a SQL Server database?
negative_passages.docid: 83354
negative_passages.text: Nullable types: better way to check for null or zero in c#
negative_passages.docid: 151469
negative_passages.text: What is the difference between null and System.DBNull.Value?