select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
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..?
Select char_length(cast('123456789 1' as varchar(10))) from rdb$database. Получаем: Exception ... string truncation Т.е. пробел мы обрезать можем, а другие символы нет.
Note: A NULL value is different from a zero value or a field that contains spaces.
> char array[SIZE] = {0}; Nothing wrong with this. It just assumes that the remaining SIZE-1 elements are also zero, so that's it, job done.
The null character (also null terminator or null byte), abbreviated NUL or NULL, is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII)...
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...
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)
You can use the Oracle IS NOT NULL condition in either a SQL statement or in a block of PLSQL code.
Why is it that when we have a NULL value in a column and we order by the value ascending, the NULLs are sorted first? … results in …