999999.9 /**/union/**/all /**/select /**/cast...
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database. If TYPE OF is used with a (VAR)CHAR type
999999.9 /**/union/**/all /**/select /**/cast...
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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
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. Так и должно быть или нет?
SQL Server CAST() Function
CAST(expression AS datatype(length)). Parameter Values.
CAST and CONVERT (Transact-SQL) - SQL Server | Microsoft Docs
SELECT DISTINCT CAST(EnglishProductName AS char(10)) AS Name, ListPrice FROM dbo.DimProduct WHERE EnglishProductName
Преобразование типов и оператор CAST | Интерактивный учебник...
Во-вторых, результат функции CAST для значения выражения, равного NULL, тоже будет NULL.
sql server - Storing NULL versus storing '' in a varchar column...
I realize this may be marked as duplicate, but I'm specifically asking in relation to SQL Server 2005 I have read conflicting advice on the internet so I'm asking here.
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)
R null values: NULL, NA, NaN, Inf | R-bloggers
In general, R supports: NULL NA NaN Inf / -Inf NULL is an object and is returned when an expression or function results in an undefined value.