...9199'+union+select+ NULL,NULL,NULL,version(),NULL,NULL,NULL,NULL,NULL,NULL,NULL.
I have come across some code that says … What exactly is this doing? Is it getting the field names unitcost and markup? Why would you use "select null as..."? New to this sorry. Thanks.
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f
Швейная машинка Union полностью в рабочем состоянии.
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...
SELECT CAST (miles AS INT) FROM Flights -- convert timestamps to text INSERT INTO mytable (text_column) VALUES (CAST (CURRENT_TIMESTAMP AS VARCHAR(100))) -- you must cast NULL as a data type to use it SELECT airline FROM Airlines UNION ALL VALUES (CAST...
Note: A NULL value is different from a zero value or a field that contains spaces.
The Oracle IS NOT NULL condition is used to test for a NOT NULL value.
R language supports several null-able values and it is relatively important to understand how these values