NULL & NOT NULL VALUE

NULL VALUE | IS NULL SYNTAX  | IS NOT NULL SYNTAX | NULL & NOT NULL OPERATORS  | PRACTICE YOURSELF

NULL VALUE

A Field with No value can be represented as a NULL Value. NULL means an absence of any value. Therefore, A NULL value in a field is different than having a Zero value or a space.

IS NULL SYNTAX

IS NOT NULL SYNTAX

Where,

• SELECT                                                    : KEYWORD used to Fetch data from a database

• Table_Name                        : The Table name from where you want to fetch the data

• IS NULL/IS NOT NULL             :  KEYWORD used to determine type of values

NULL & NOT NULL OPERATORS

​

PRACTICE YOURSELF 

Want More SQL Deep Dives

1. SQL Introduction

2. Database Overview

3. Creating a Database

4. Dropping a Database

5. Table Fundamentals

6. Table Types

7. Datatypes in SQL

8. DDL, DML, TCL & DCL

9. Null & Not Null Values

10. Creating Tables

11. SQL - Constraints

12. SQL - Index 

13. SQL Inserting Data

14. SQL Identity Columns

15. Selecting Data

16. Using Distinct

17. SQL in NOT IN

18. Using Top Clause

19. Where Clause

20. Group By

21. Order By

22. Having

23. Exists

24. Offset

25. SQL - Operators

26. Between

27. Update

28. Delete

29. SQL - Aggregate Functions

30. SQL - Introductions to Joins

31. Table Alias

32. SQL - Inner Join

33. SQL - Left Join

34. SQL - Right Join

35. Full Join

36. Self Join

37. SQL Union

38. Pivot

39. Alter Command

40. Limit Clause

41. Truncate

42. Drop

43. Table Backup

44. SQL - Normalization

45. Subquery

46. SQL - Views & Materialized Views

47. Case Statement

48. SQL Transactions

49. SQL - Scaler Functions

50. Working with Dates

51. Grant revoke

52. SQL - Performance Tunning

53. Stored Procedure Basics

54. Stuff function

55. Keyword

56. SQL - Miscellaneous