Table normalisation and empty values
72088
Why shouldn't we allow NULLs?
32557
Leaving values blank if not passed in str.format
121322
How do you drop a default value or similar constraint in T-SQL?
11954
What is the most straightforward way to pad empty dates in sql results (on either mysql or perl end)?
61783
Returning an unevaluated expression with values substituted in
54588
Replacing all values in a table > $T$
90969
De normalize predicted value
123126
Why does query error with empty result set in SQL Server 2012?
10912
Changing precision on a column in the attribute table without losing data?
127800
SQL: Using NULL values vs. default values
117690
Empty factors in "by" data.table
107743
Java String split removed empty values
425
Normalize a MySQL table with more than 250 Boolean columns
93530
SQL Server 2008 Empty String vs. Space
30660
Empty set does not belong to empty set
81776
Replacing all null values from attribute table with zeros in QGIS
112883
How to initialize a dict with keys from a list and empty value in Python?