As shown below, I need not null values to be at the start of all output fields.
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
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...
999999.9' union all select 999,2 and '0'='0 где купить в аптеках, Поиск и заказ лекарств в аптеках Санкт-Петербурга и Ленинградской области онлайн, бронирова��ие и доставка лекарств.
SELECT customer_key as customer_key FROM customer_dimension t0 UNION ALL SELECT null AS customer_key FROM employee_dimension.
Note: A NULL value is different from a zero value or a field that contains spaces.
Специальное значение NULL означает отсутствие данных, констатацию того факта, что значение неизвестно. По умолчанию это значение могут принимать столбцы и переменные любых типов, если только на них не наложено ограничение NOT NULL.
NULL handling in the Oracle database is even more special. Contrary to common believe, using
SELECT CHAR(0x66) (S) SELECT 0x5045 (this is not an integer it will be a string from Hex) (M)
The IS NOT NULL condition is used in SQL to test for a non-NULL value.