Error code
Oracle ORA-01400
ORACLEORA-01400
Database Error Code· An error code returned by a database server such as PostgreSQL or MySQL.
What it means
cannot insert NULL into a NOT NULL column.
How to fix it
- Provide an explicit non-NULL value for the column in the statement.
- Add a DEFAULT clause to the column definition so missing values are filled automatically.
- Audit the application code to ensure all required fields are populated before the write.
Not affiliated with Oracle. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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