c - What is the difference between NULL, '\0' and 0 - Stack Overflow
In C, there appear to be differences between various values of zero -- NULL, NUL and 0. I know that the ASCII character '0' evaluates to 48 or 0x30. The NULL pointer is usually defined as: … Or …
sql - Union to handle NULL values - Stack Overflow
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f
Understanding the difference between null and '\u000' in Java
I read in a book (Thinking in Java by Bruce Eckel, 4th edition, page 47) that null is equal to '\u000'. And then I was wondering what exactly does '\u000' really mean.
mysql - Site has been hacked via SQL Injection - Stack Overflow
0x31303235343830303536 is NULL - they are just matching the number of columns in your existing query. If you had SELECT * FROM users and users had 4 columns, the UNION must also have 4
Replacing NULL with 0 in a SQL server query - Stack Overflow
I have developed a query, and in the results for the first three columns I get NULL. How can I replace it with 0?
sql union all data type error with nulls - Stack Overflow
Then in the second table I have select ..., null as opt from... I know that I could have an empty string with '' as opt however, I don't want an empty string, I really do need it to be null.
SQL NULL Values - IS NULL and IS NOT NULL
Note: A NULL value is different from a zero value or a field that contains spaces.
Null character - Wikipedia
The null character (also null terminator or null byte), abbreviated NUL or NULL, is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII)...
JavaScript: загадочное дело выражения null >= 0 / Блог... / Хабр
Вопрос о сравнении null и 0, на самом деле, не такой уж и сложный. Однако, поиск ответа открыл мне кое-что новое о JavaScript.
R null values: NULL, NA, NaN, Inf | R-bloggers
R language supports several null-able values and it is relatively important to understand how these values