Using SELECT * FROM SOME_EXISTING_TABLE Error Based. This works if you know the table name you're after and error showing is enabled. It will return the amount of columns in the table, not the query.
UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a query that has the same number
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL
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...
So, I will never enter in if (x == null && y == null)? – serhio Nov 2 '10 at 12:08. point d is flat out NO, see comments. if they are pointing to a field on the object.
Hours 1 1 2 null null null. The result must be: 3. My query is: select count(distinct hour) from hours; but it returns: 2. I tested also
Select decode (a, null, 'Null is equal', 'Null is not equal') from test.
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
The first to see what might of happened here, the ‘null’ name bit, is the following command
The IS NULL operator is used to test for empty values (NULL values). The following SQL lists all customers with a NULL value in the "Address" field