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MySQL Error 2002: Can't Connect Through Socket

Fix MySQL Error 2002 by checking mysqld, the Unix socket or Windows named-pipe endpoint, client and server settings, and TCP/IP separately.

MySQL Error 2003: Can't Connect to MySQL Server

Fix MySQL Error 2003 by checking the server, host and port, TCP/IP settings, bind_address, skip_networking, and network access rules.

MySQL Error 2005: Unknown MySQL Server Host

Fix MySQL Error 2005 by checking the hostname, DNS from the client environment, and MySQL connection options or application settings.

MySQL Error 2006: MySQL Server Has Gone Away

Fix MySQL Error 2006 by checking idle connection timeouts, max_allowed_packet, server restarts, and stale application connections.

MySQL Error 2013: Lost Connection During Query

Troubleshoot MySQL Error 2013 by distinguishing initial connection timeouts from query-time network drops, transfer stalls, and large packets.

MySQL Error 2026: SSL Connection Error

Troubleshoot MySQL Error 2026 by checking certificate trust, host-name verification, TLS versions and ciphers, and account certificate requirements.

PostgreSQL Error 08006: Connection Failure

Troubleshoot PostgreSQL SQLSTATE 08006 by checking server restarts, network interruptions, keepalives, and uncertain transaction outcomes.

PostgreSQL Error 23503: Foreign Key Violation

Diagnose PostgreSQL SQLSTATE 23503 by checking missing parent rows, blocked parent deletes, and existing rows that violate a new foreign key.

PostgreSQL Error 23505: Duplicate Key Violates Unique Constraint

Diagnose PostgreSQL SQLSTATE 23505 by identifying the unique key, finding conflicting rows, and choosing an intentional ON CONFLICT action.

PostgreSQL Error 25P02: Current Transaction Is Aborted

Fix PostgreSQL SQLSTATE 25P02 by finding the first error in the transaction, then rolling back or recovering to a savepoint.