| Error | Likely Cause | Solution | |-------|--------------|----------| | ORA-12154: TNS could not resolve | Missing or wrong TNS entry | Check tnsnames.ora location or use Basic connection | | ORA-12541: No listener | DB host/port wrong or listener down | Verify network, firewall, and listener status | | Driver manager can't find driver | PATH not set or driver not installed | Re-run odbc_install.exe and verify PATH | | Unicode data truncated | Character set mismatch | Set NLS_LANG=AMERICAN_AMERICA.AL32UTF8 | | Performance too slow | No array fetch size set | Configure FetchBufferSize=100 in DSN |
The Oracle ODBC driver acts as a translator between an application (e.g., Microsoft Access) and the Oracle Database. When an application sends an SQL request via ODBC: oracle odbc
Driver=Oracle in instantclient_23_4;Dbq=192.168.1.100:1521/orclpdb;Uid=scott;Pwd=tiger; | Error | Likely Cause | Solution |
# Fetch the results results = cursor.fetchall() oracle odbc