NULL Values In SQL | SQL UNION Clause - DataFlair

Подсчет null и не null значений в SQL: одним запросом

How the SQL UNION Operator Deals with NULL Values

Объединение UNION и UNION ALL в SQL – описание и примеры

[text] [varchar](50) NULL, CONSTRAINT [PK_test_table] PRIMARY KEY CLUSTERED (. select id ,number, text from test_table union all select '', number, text from test_table_2. т.е. как Вы видите просто там, где должно быть поле ставить пусто и запрос отлично отработает, например

SELECT INTO and non-nullable columns - Brent Ozar Unlimited

Select null union all select null union all select null union all. select … into NewTable (ID INT NOT NULL IDENTITY, [other columns here]). With that syntax there’s no hack and you can specify the target table schema inline (including indexes and whatnot).

sql injection "union select null" - CodeProject

Union select null, null, null, null, null, null, null from information_schema.tables. Chances are they have and don't get it.

SQL UNION overview, usage and examples

sql - How null values are treated in union/union all in... - Stack Overflow

select null union all select null. Outputs As null null then how the value null is treated here and in which datatype it is considered?

SQL UNION ALL

SQL UNION