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. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...
Note: A NULL value is different from a zero value or a field that contains spaces.
Use NULL in UNION injections for most data type instead of trying to guess string, date, integer etc. Be careful in Blind situtaions may you can understand error is coming from DB or
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...option=com_ncatalogues&controller=ajax&task=multiselect&id=28%20UNION%20ALL
If I have this - tadd is the Address table: … Is there a way to exclude the apt_number if it doesn't exist? I was thinking of: … But it will return only those rows with apt_number...
1 UNION ALL SELECT NULL,concat(0x28,column1,0x3a,column2,0x29) FROM database2.table1--. Error Based.
The IS NOT NULL condition is used in SQL to test for a non-NULL value.
SQL’s NULL indicates absent data. NULL propagates through expressions and needs distinct