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0x31303235343830303536 is NULL - they are just matching the number of columns in your existing query. If you had SELECT * FROM users and users had 4 columns, the UNION must also have 4 columns. As a result, they just used `NULL values to populate those columns.
Type: UNION query Title: Generic UNION query (NULL) - 4 columns Payload: id=-4130 UNION ALL SELECT NULL,NULL,CONCAT(0x71627a7071
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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...
Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, а
Для значения стиля NULL возвращается NULL.For a style value of NULL, NULL is returned. Аргумент data_type определяе�� диапазон.data_type