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.
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 set and collation are retained.
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)...
-999.9+union+all+select+%27R3DM0V3_hvj_injection',null%2CNULL%2CNULL%2CNULL%2CNULL%2CNULL
Then in the second table I have select ..., null as opt from... I know that I could have an empty string with '' as opt however, I don't want an empty string, I really do need it to be null.
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union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
CAST(expression AS datatype(length)). Parameter Values.
Классический вариант внедрения SQL-кода, когда в уязвимый параметр передается выражение, начинающееся с «UNION ALL SELECT».
In R language, NULL … Continue reading R null values: NULL, NA, NaN, Inf.