Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow
UNION ALL SELECT NULL, *, NULL, NULL FROM email.
sql - CONCAT'ing NULL fields - Stack Overflow
just run SET CONCAT_NULL_YIELDS_NULL OFF and then all null concatenations will result in text and not null..
mysql - Return 0 when SELECT COUNT is null - Stack Overflow
SELECT m.id, m.name, m.description, m.directions, COUNT(j.markerid) as marker_jingles FROM markers AS m LEFT OUTER JOIN jingles AS j ON j.markerid=m.id WHERE 1. But am a bit stuck because I cannot figure out how to get it to return rows when the COUNT is 0.
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
(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...
Хитрости count() в SQL: m_ivanov — ЖЖ
SELECT id, count(*), count(price>1) FROM usr GROUP BY id. Конечно, в таком виде запрос не сработает.
SQL запросы быстро. Часть 1 / Хабр | SELECT, FROM
SELECT, FROM — обязательные элементы запроса, которые определяют выбранные столбцы, их порядок и источник данных.
SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions
Look at the following SELECT statement: SELECT ProductName, UnitPrice * (UnitsInStock + UnitsOnOrder) FROM Products
SQL Tip: COUNTing NULL values – Benjamin's Blog
sqlbenjamin.wordpress.com
I've been asked about counting NULL values several times so I'm going to blog about it in hopes others will be helped by this explanation of NULL values in
Обработка значений NULL - ADO.NET | Microsoft Docs
NULL не является ни пустой строкой (для типов данных character или datetime), ни