识别数据库

MySQL

• sleep sleep(1)
• benchmark BENCHMARK(5000000, MD5('test'))
• 字符串连接
  • SELECT 'a' 'b'
  • SELECT CONCAT('some','string')
• version
  • SELECT @@version
  • SELECT version()
• 识别用函数
  • connection_id()
  • last_insert_id()
  • row_count()

Oracle

• 字符串连接
  • 'a'||'oracle' --
  • SELECT CONCAT('some','string')
• version
  • SELECT banner FROM v$version
  • SELECT banner FROM v$version WHERE rownum=1

SQLServer

• WAITFOR WAITFOR DELAY '00:00:10';
• SERVERNAME SELECT @@SERVERNAME
• version SELECT @@version
• 字符串连接
  • SELECT 'some'+'string'
• 常量
  • @@pack_received
  • @@rowcount

PostgreSQL

• sleep pg_sleep(1)