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sql injection "union select null" - CodeProject
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...
Шпаргалка по SQL инъекциям | DefconRU
Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, а
select - Oracle: How to count null and non-null rows - Stack Overflow
I have a table with two columns that might be null (as well as some other columns). I would like to count how many rows that have column a, b, both and neither columns set to null. Is this possible with Oracle in one query? Or would I have to create one query for each?
sql - Counting null values as unique value - Stack Overflow
Hours 1 1 2 null null null. The result must be: 3. My query is: select count(distinct hour) from hours
SQL Инъекции | Page 798 | ANTICHAT - Security online community
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Взламываем сайты: шпаргалка по SQL инъекциям
#SQL Server SELECT login + '-' + password FROM members #MySQL SELECT CONCAT(login, password) FROM members. В MySQL для обхода сложных паттернов можно представлять строки в шеснадцатиричном виде, с помощью функции HEX() или вводить их посимвольно
COUNT, DISTINCT, and NULLs - SQL with Bert
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 that isn’t always as intuitive as many people think. Whenever using COUNT or DISTINCT, make sure to test with NULLs to make...
Заметка про NULL / Хабр | select col from ttt where col is not null
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с
SQL Tip: COUNTing NULL values – Benjamin's Blog
sqlbenjamin.wordpress.com
· Using SELECT COUNT(*) or SELECT COUNT(1) (which is what I prefer to use) will return the total of all records returned in the result set regardless of NULL values.
SQL COUNT(), AVG() and SUM() Functions
...Select Select Distinct Select Into Select top set Table top Truncate Table Union