'' represents a zero length character string BUT NOT a null value : CHAR « Data Type « Oracle PL / SQL

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Oracle PL / SQL » Data Type » CHAR

'' represents a zero length character string BUT NOT a null value


   

SQL> select 12 from dual where null = '';



no rows selected



SQL>

SQL>

Related examples in the same category

1.	The CHAR data type is used for storing fixed-length character strings.
2.	char type with 50 characters
3.	Define varchar2 type variable
4.	Comparison of CHAR with VARCHAR2
5.	Define and use char value
6.	set column width by setting char number
7.	CHAR() and VARCHAR2()
8.	No equality comparison between two '' strings
9.	Compare char value without knowing the case
10.	Convert string to clob
11.	char type and varchar2 type
12.	Memory allocation differences between the CHAR and VARCHAR2 datatypes

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