Updating fields to NULL

Setting a field to NULL works exactly like with any other value:

UPDATE Employees 
SET ManagerId = NULL
WHERE Id = 4

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NULL:

*NULL

*Filtering for NULL in queries

*Nullable columns in tables

*Updating fields to NULL

*Inserting rows with NULL fields

Table Of Contents

0Getting started with SQL

1SELECT

2JOIN

3Example Databases and Tables

10INSERT

14Filter results using WHERE and HAVING

15Window Fnctions

16Common Table Expressions

17Views

18LIKE operator

19Functions Aggregate

20DELETE

26MERGE

28Finding Duplicates on a Column Subset with Detail

38SQL Group by vs. Distinct

39Table Design

40CROSS APPLY and OUTER APPLY

41Synonyms

42CREATE database

43SKIP TAKE pagination

44EXPLAIN and DESCRIBE

47NULL

51DROP or DELETE database

52EXCEPT

53TRYCATCH

54XML

55GRANT and REVOKE

56Functions ScalarSingle Row