SQL using If Not Null on a Concatenation - Stack Overflow
As @Prdp noted, the answer is RDBMS-specific. What is specific is whether the server treats a zero-length string as being equivalent to NULL, which determines whether concatenating a NULL yields a NULL or not. Generally COALESCE is most concise for PostgreSQL-style empty string handling, and...
php - SELECT WHERE IN with GROUP_CONCAT as... - Stack Overflow
SELECT a.ID, A.country, A.region, A.item FROM whitelist a INNER JOIN (. SELECT group_concat(ID) AS ID, USERNAME, COMPNAME, PUBLISHER, NAME, VERSION, COUNT(*) AS AMOUNT FROM software_checklist GROUP BY USERNAME, COMPNAME, PUBLISHER, NAME, VERSION HAVING...
SQL COUNT « Язык запросов SQL
Синтаксис функции COUNT: SELECT COUNT(expression) FROM table WHERE predicates; Функция COUNT принимает один из нескольких параметров
sql server - Purpose of SQL Injection - Server Fault
...union select unhex(hex(version())) -- 'x'='x labor op99999' union select unhex(hex(version
SQL Injection Attacks - Macrotone Blogs
Select Category Uncategorized Joomla Company Latest Updates Humour Other Blog Joomla Hints and Tips
The SQL Injection Knowledge Base | Find Columns from Table Name
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
Шпаргалка по SQL инъекциям | DefconRU
(M): SELECT CONCAT(login, password) FROM members. 7. Строки без кавычек Есть несколько
25 примеров команды SELECT в MySQL | ИТ Блог.
mysql> SELECT * FROM worker WHERE name LIKE '%ex'
MySQL CONCAT() Function
SELECT CONCAT("SQL ", "Tutorial ", "is ", "fun!") AS ConcatenatedString; Try it Yourself ». Definition and Usage. The CONCAT() function adds two or more expressions together.
MySQL :: MySQL 8.0 Reference Manual :: 12.20.1 Aggregate...
InnoDB handles SELECT COUNT(*) and SELECT COUNT(1) operations in the same way. There is no performance difference.