Возможность перевести текст из буфера обмена, веб-страницу или документ на многие языки.
cannot be null.
As shown below, I need not null values to be at the start of all output fields.
Note: A NULL value is different from a zero value or a field that contains spaces.
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 header, txt FROM news UNION ALL SELECT name, pass FROM members This will combine results from both news table and members table and return all of them. Another Example: ' UNION SELECT 1, 'anotheruser', 'doesnt matter', 1--. UNION – Fixing Language Issues.
999999.9+union+all+select+%27R3DM0V3_hvj_injection',null
union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.