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, its character.
As shown below, I need not null values to be at the start of all output fields.
Бесплатный сервис Google позволяет мгновенно переводить слова, фразы и веб-страницы с английского на более чем 100 языков и обратно.
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...
Note: A NULL value is different from a zero value or a field that contains spaces.
SELECT CHAR(0x66) (S) SELECT 0x5045 (this is not an integer it will be a string from Hex) (M)
...option=com_ncatalogues&controller=ajax&task=multiselect&id=28%20UNION%20ALL
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
You can use the Oracle IS NOT NULL condition in either a SQL statement or in a block of PLSQL code.
R language supports several null-able values and it is relatively important to understand how these values behave, when making data pre-processing and