select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f from table3.
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UNION ALL Syntax. The UNION operator selects only distinct values by default.
CAST( expression AS datatype(length) ). Parameter Values.
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.
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...
Ref: 999999.9' union all select 99,2 and '0'='0.
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- No Error - Syntax is right.
In R language, NULL … Continue reading R null values: NULL, NA, NaN, Inf.