How can I run a MySQL query that selects everything that is not null? It would be something like … Do I just remove the all and go..?
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...
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
I've found some good advice all over this board, but here's another, simpler, question I'm sure anyone can answer. I'm using borland 5 and i can't seem to set my char arrays to the null character. I've tried char name[10]=/0; char name[10]...
SELECT CAST (miles AS INT) FROM Flights -- convert timestamps to text INSERT INTO mytable (text_column)
A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this
Классический вариант внедрения SQL-кода, когда в уязвимый параметр передается выражение, начинающееся с «UNION ALL SELECT». Эта техника работает, когда веб-приложения напрямую возвращают результат вывода команды SELECT на страницу...
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)
The Oracle IS NOT NULL condition is used to test for a NOT NULL value.