UNION ALL SELECT NULL, *, NULL, NULL FROM email.
select `4` from (select 1,2,3,4,5,6 union select * from users)dbname; Injection example inside the query select author_id,title from posts where
I understand that with CONCAT_NULL_YIELDS_NULL = ON means that the following will always resolve to NULL. SELECT NULL + 'My String'.
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...
This includes NULL values and duplicates. How can you have a null value in a group?
(M): SELECT CONCAT(login, password) FROM members. 7. Строки без кавычек Есть несколько способов не использовать кавычки в запросе, например с помощью CHAR() (MS) и CONCAT() (M). Синтаксис: SELECT 0x457578 (M). В MySQL есть простой способ представления строки в...
returns non null values in group */ SELECT COUNT(Col1) FROM ##TestData; Because of this, COUNT, DISTINCT, and NULLs have a special relationship with each other
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
AND(SELECT COUNT(*) FROM (SELECT 1 UNION SELECT null UNION SELECT !1)x GROUP BY CONCAT((SELECT column_name FROM information_schema.columns LIMIT 1),FLOOR
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.