Better performance to have nullable columns or an extra table?
72088
Why shouldn't we allow NULLs?
145241
Using an ORM or plain SQL?
39592
Are there disadvantages to using VARCHAR(MAX) in a table?
42458
SQLite .NET performance, how to speed up things?
155916
Disadvantage of Changing database schema - Insert or delete new columns/tables in middle
101146
Why can't I write Nullable>?
110077
Is it good practice to NULL a pointer after deleting it?
141355
SQL left join vs multiple tables on FROM line?
89714
What is the difference between Nullable.HasValue or Nullable != null?
83354
Nullable types: better way to check for null or zero in c#
83110
JOIN versus EXISTS performance
135864
Does column ordering affects performance in Microsoft SQL Server 2012?
8316
Do frequent DML operations on a table with indexes and huge data affect SELECT query performance?
98908
Is it good practice to set variables to null when they are no longer needed?
124471
Comparing nullable column values using "IS NULL" versus "= NULL"
6255
Is it safe to delete a NULL pointer?
120506
Performance/efficiency of 2 SELECT statements vs UNION vs anything else in MySQL-PHP