select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
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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 999,2 and '0'='0 где купить в аптеках, Поиск и заказ лекарств в аптеках Санкт-Петербурга и Ленинградской области онлайн, бронирование и доставка лекарств.
Note: A NULL value is different from a zero value or a field that contains spaces.
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...
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.
Null values can arise when you refer to message fields that do not exist, access database columns for which no data has been supplied, or use the keyword NULL
You can use the Oracle IS NOT NULL condition in either a SQL statement or in a block of PLSQL code.
Union select null, null, null, null, null, null -- test all nulls --*/ ). A. DECLARE @ColumnDynamicSQL nvarchar(MAX)