Then in the second table I have select ..., null as opt from... I know that I could have an empty string with '' as
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. Так и должно быть или нет?
I understand that a char variable can accept a null character(1 byte) i.e; \0 as its value but, I don't understand how a char variable in my application below accepts a pointer(4 bytes)...
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...
> 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.
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
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)
SELECT CAST('abc' AS varchar(5)) COLLATE French_CS_AS. Truncating and rounding results. When converting character or binary expressions (binary, char
R language supports several null-able values and it is relatively important to understand how these values behave, when making data pre-processing and