select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
I need results to be shown in one row instead of few. Query: … I suppose I need to get rid somehow of few things in GROUP BY however I don't really have an idea how to change the query itself to make...
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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...
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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
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A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this
Оператор объединения с NULL ?? возвращает значение своего операнда слева, если его значение не ��авно null.
In database theory, NULL is unknown or missing information. The NULL value is different from an empty string or number zero. For example, you can ask a person for an email address, if you don’t know, you use the NULL value for inserting into the email column.