MySQL
http://pentestmonkey.net/cheat-sheet/sql-injection/mysql-sql-injection-cheat-sheet
http://www.sqlinjectionwiki.com/categories/2/mysql-sql-injection-cheat-sheet/
https://www.tutorialspoint.com/mysql/mysql-sql-injection.htm
https://dev.mysql.com/doc/refman/5.7/en/bit-functions.html
http://garage4hackers.com/showthread.php?t=1990
https://www.perspectiverisk.com/mysql-sql-injection-practical-cheat-sheet/
https://www.netsparker.com/blog/web-security/sql-injection-cheat-sheet/#UnionInjections
https://websec.ca/kb/sql_injection
http://hakipedia.com/index.php/SQL_Injection
http://blog.kotowicz.net/2013/01/abusing-mysql-string-arithmetic-for.html
https://media.blackhat.com/us-13/US-13-Salgado-SQLi-Optimization-and-Obfuscation-Techniques-WP.pdf
http://www.securiteam.com/securityreviews/5JP0F20EUM.html
https://osandamalith.com/2017/02/03/mysql-out-of-band-hacking/
http://zombiehelp54.blogspot.ro/2017/02/sql-injection-in-update-query-bug.html?m=1
http://stackoverflow.com/questions/14714750/how-to-get-true-size-of-mysql-database
http://stackoverflow.com/questions/5648420/get-all-columns-from-all-mysql-tables
http://www.regular-expressions.info/creditcard.html
Oracle
http://www.0xdeadbeef.info/exploits/raptor_oraexec.sql
http://pentestmonkey.net/cheat-sheet/sql-injection/oracle-sql-injection-cheat-sheet
http://www.sqlinjectionwiki.com/Categories/3/oracle-sql-injection-cheat-sheet
https://information.rapid7.com/rs/rapid7/images/R7%20SQL_Injection_Cheat_Sheet.v1.pdf
http://www.sqlinjection.net/union/
SQL Server
https://information.rapid7.com/rs/rapid7/images/R7%20SQL_Injection_Cheat_Sheet.v1.pdf
https://www.gracefulsecurity.com/sql-injection-exploitation/
http://pentestmonkey.net/cheat-sheet/sql-injection/mssql-sql-injection-cheat-sheet
http://websec.ca/kb/sql_injection#MSSQL_Default_Databases
https://www.netsparker.com/blog/web-security/sql-injection-cheat-sheet/
http://pentestmonkey.net/blog/mssql-dns
http://www.sqlinjectionwiki.com/Categories/1/mssql-sql-injection-cheat-sheet/
https://www.codeproject.com/Questions/219741/Select-nth-row-of-a-table-in-sql-server
http://www.sqlinjection.net/time-based/
https://stackoverflow.com/questions/639854/check-if-a-row-exists-otherwise-insert
