select null union all select null. Outputs
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f from table3.
Union select null, null, null, null, null, null, null from information_schema.tables.
Используйте NULL в UNION-инъекциях вместо попыток угадать строку, дату, число и прочее.
...NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT%28version
' UNION SELECT NULL-- ' UNION SELECT NULL,NULL-- ' UNION SELECT NULL,NULL,NULL-- etc. If the number of nulls does not match the number of columns, the database returns an error, such as: All queries combined using a UNION, INTERSECT or EXCEPT operator must have an equal number...
I do not want to show revords with null values in any column i only want to only records with data in all column. How can i set that. Please help.
The UNION operator selects only distinct values by default. To allow duplicate values, use UNION ALL
--Запрос №3 select * from dual where null=null. Очевидно, что запрос №3 не вернет ни одной строки, соответственно, запрос №1 также не вернет ни одной строки.
...NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL# September 13, 2018 8:48am 5.101.40.103 (Russian Federation) Blocked for SQL Injection in query string: p=44%’ UNION ALL SELECT NULL,NULL,NULL,NULL,NULL