How can I run a MySQL query that selects everything that is not null? It would be something like … Do I just remove the all and go..?
> char array[SIZE] = {0}; Nothing wrong with this. It just assumes that the remaining SIZE-1 elements are also zero, so that's it, job done.
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...
Note: A NULL value is different from a zero value or a field that contains spaces.
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)...
union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
Null values can arise when you refer to message fields that do not exist, access database columns for which no data has been supplied, or use the keyword NULL
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)