So, as it's being used a lot, I would submit my answer. In my opinion, the aim of these requests is to check the presence or absence of a sql injection.
Если злоумышленник передаст в качестве параметра id конструкцию -1 UNION SELECT 1,username, password,1 FROM admin, это вызовет выполнение SQL-запроса.
-999.9+union+all+select+%27R3DM0V3_hvj_injection',null%2CNULL%2CNULL%2CNULL%2CNULL%2CNULL
-999.9+union+all+select+%27R3DM0V3_hvj_injection',null%2CNULL%2CNULL%2CNULL%2CNULL%2CNULL%2CNULL%2CNULL
Word Spark search letters: Llc)+UNION+ALL+SELECT+NULL,NULL,NULL,NULL,NULL,NULL
• SQL Injection into a String/Char parameter Example: SELECT * from table where example
SELECT(extractvalue(0x3C613E61646D696E3C2F613E,0x2f61)).
As a result, when this new category of losses is added to the previous casualty figures, the authors concluded that the Price of Soviet Victory in the war reached roughly 14,6 million men.
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