999999.9 /**/union/**/all /**/select /**/cast...
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.
sql union all data type error with nulls - Stack Overflow
Then in the second table I have select ..., null as opt from... I know that I could have an empty string with '' as
sql injection "union select null" - CodeProject | To display as
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...
initializing char arrays to null | Forum
> 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.
SQL NULL Values - IS NULL and IS NOT NULL
Note: A NULL value is different from a zero value or a field that contains spaces.
Null character - Wikipedia
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)...
PostgreSQL: IS NULL Condition | Example - With SELECT Statement
Description. The PostgreSQL IS NULL condition is used to test for a NULL value in a SELECT, INSERT, UPDATE, or DELETE statement.
SELECT NULL VALUES AS ZERO - DB2 Database
How can I select blank columns as zero? Not sure what you are trying to do. Does this come close? coalesce(nullif(val,''),'0'). Note that "zero" has to be char instead of int.
How to retreive only columns which having at least one not null value...
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)