Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is
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...
...NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT%28version(),0x3a,user
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL Server.
Play 999999 9 UNION ALL SELECT NULL NULL...
You should use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
-1 union select 1 into @,@,@ The used SELECT statements have a different number of columns.
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
2. Полная поддержка шести техник SQL-инъекций: слепая логическая (boolean-based blind), слепая, основанная на времени (time-based blind), основанная на ошибке (error-based), основанная на запросе UNION (UNION query-based), многоярусные запросы (stacked queries)...
pool.query('SELECT 1 + 1 AS solution', function (error, results, fields) { if (error) throw error; console.log('The solution is: ', results[0].solution); }); This is a shortcut for the pool.getConnection() -> connection.query() -> connection.release() code flow. Using pool.getConnection() is useful to share...