select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f
I have developed a query, and in the results for the first three columns I get NULL. How can I replace it with 0?
Note: A NULL value is different from a zero value or a field that contains spaces.
union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...
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)...
...null,null,null,null,null,null,null,null-- Again we got a error : The text data type cannot be selected as
Свя��ано ли это с типом null и с тем, как он обрабатывается, или с тем, как выполняются операции сравнения значений? В итоге я решил докопаться до сути происходящего и начал рыться в единственном источнике истины для JavaScript — в спецификации ECMA.
R language supports several null-able values and it is relatively important to understand how these