Oracle: Resolve ORA-00257 – Connect AS SYSDBA only until resolved

Recently, one of the Oracle users complained that the database was unusable and received the error below I looked at the space situation and it looked good (PowerShell command is from the dbatools module¬†and allows you to get this server space info. from your own host) Next, I looked at the alert log and saw … Continue reading Oracle: Resolve ORA-00257 – Connect AS SYSDBA only until resolved

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Oracle & .NET: Resolve – Exception calling “Fill” with “1” argument(s): ‘count’ must be non-negative.

This is one of those obscure errors that has no answer on the Web. I ran into this error trying to migrate an Oracle table to SQL Server (one of many). The issue seemed to be only with certain rows of this table as it migrated majority of the data without issues. Below is the … Continue reading Oracle & .NET: Resolve – Exception calling “Fill” with “1” argument(s): ‘count’ must be non-negative.

Oracle On Windows – Simple Timeout To Crisis To Moving Data Files to Another Drive

I wanted to do a small post on using the DOS command line tool ADRCI to quickly locate problems from the alert log and acting on them to fix the issue(s) when using Oracle on Windows. It should not be much different on Linux.¬†This is a 100 level post. The call: Timeouts Another normal day … Continue reading Oracle On Windows – Simple Timeout To Crisis To Moving Data Files to Another Drive

Eating An Elephant – How To Work With Huge Datasets In Oracle And SQL Server

Simplifying complex problems is difficult but when done, the rewards are definitely worth it. How I single-handedly managed to migrate 55 Billion rows in 4000+ tables: Last year, I created PowerPump a PowerShell based data copy server which continuously migrated 4000+ Oracle tables to SQL Server. It was no simple task given that I had … Continue reading Eating An Elephant – How To Work With Huge Datasets In Oracle And SQL Server

Oracle – Find A Needle In The Hay Stack – How To Pinpoint Data Errors Like “ORA-12899: value too large for column”

Nasty data-related errors: If you are looking to resolve one of these types of errors, you are in the right place. Please keep reading. ORA-01400: cannot insert NULL into (string) ORA-01401: inserted value too large for column ORA-02290: check constraint (string.string) violated ORA-02291: integrity constraint (string.string) violated - parent key not found ORA-02292: integrity constraint … Continue reading Oracle – Find A Needle In The Hay Stack – How To Pinpoint Data Errors Like “ORA-12899: value too large for column”