Using SELECT * FROM SOME_EXISTING_TABLE Error Based. This works if you know the table name you're after and error showing is enabled.
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...
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 val1 AS val FROM your_table WHERE val1 IS NOT NULL UNION ALL SELECT val2 FROM your_table WHERE val2 IS NOT NULL /*And so
select (SELECT ', ... ' +ltrim(rtrim(tc.c)) +' - '+ ltrim(rtrim(tc.d)) FROM test tc FOR XML PATH(''),type).value('(./text())[1]','varchar(max)'). This one produces the correct result. Here comes my real issue: It works only when I set CONCAT_NULL_YIELDS_NULL on.
Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, а строка) (M) SELECT 0x50 + 0x45 (теперь это число) (M)
SELECT, FROM — обязательные элементы запроса, которые определяют выбранные столбцы, их порядок и источник данных.
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 of columns as the query it's being merged with, and shifted
-1 UNION SELECT group_concat(username, 0x3a, password) FROM admin.
in (select name from ships) ) a where name IS NOT NULL group by country. Задание: 33 (Serge I: 2002-11-02).