select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
ксф999999.9' union all select 99,2 and '0'='0 где купить в аптеках, Поиск и заказ лекарств в аптеках Санкт-Петербурга и Ленинградской области онлайн
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f
Then in the second table I have select ..., null as opt from... I know that I could have an empty string with '' as
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...
union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
NULL handling in the Oracle database is even more special. Contrary to common believe, using
R language supports several null-able values and it is relatively important to understand how these
Null (or NULL) is a special marker used in Structured Query Language to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. Codd...