A list in alphabetical order of database error codes and alternative links to explanations of the errors and solutions beyond the core Oracle documentation set.

ORA-00439: feature not enabled: Table compression

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-01031: insufficient privileges

• Posted on Yann Neuhaus Blog

ORA-01722: invalid number

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-02303: cannot drop or replace a type with type or table dependents

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-04044: procedure, function, package, or type is not allowed here

• Posted on One-Size-Doesn't-Fit-All by Chris Muir

ORA-06502: PL/SQL: numeric or value error string

• ORA-6502 "Bulk Bind: Truncated Bind" error by Jared Still

ORA-12514: TNS:listener does not currently know of service requested in connectdescriptor

• Posted on Hans Forbrich Blog

ORA-12526: TNS:listener: all appropriate instances are in restricted mode

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-12638: Credential retrieval failed

• Posted on Oracle Brains by Rajender Singh

ORA-01450: Maximum key length (number) exceeded

• Posted on The Pythian Group Blog by Alex Gorbachev

ORA-14071: invalid option for an index used to enforce a constraint

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-25176: storage specification not permitted for primary key

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta

ORA-25194: invalid COMPRESS prefix length value

• Posted on Annals of Oracle's Improbable Errors by Flavio Casetta