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- Why do I have ORA-00904 even when the column is present?
ORA-00904-invalid identifier errors are frequently caused by case-sensitivity issues Normally, Oracle tables and columns are not case sensitive and cannot contain punctuation marks and spaces But if you use double quotes to create a quoted identifier, that identifier must always be referenced with double quotes and with the correct case For example: create table bad_design
- oracle database - Getting the error: ORA-20999: Failed to parse SQL . . .
ORA-20999: Parsing returned query results in "ORA-20999: Failed to parse SQL query! <p>ORA-06550: line 3, column 25: ORA-00936: missing expression< p>" If I try without any bind variables it compiles fine:
- ORA-12170: TNS:Connect timeout occurred - Stack Overflow
I was trying to connect to the database here in my laptop using Oracle Toad but I kept on having this error: ORA-12170: TNS:Connect timeout occurred What are the possible reasons why I kept on ha
- ORA-30926: unable to get a stable set of rows in the source tables
ORA-30926: unable to get a stable set of rows in the source tables Cause: A stable set of rows could not be got because of large dml activity or a non-deterministic where clause The merge was part of a larger batch, and was executed on a live database with many concurrent users There was no need to change the statement
- ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
If you had two identical values in the table - abcd twice, say, with the same case - then your ALTER TABLE would throw ORA-02299 despite the NOVALIDATE, as it won't be able to create the unique index to back that up In 11g you could create a virtual column and constrain that, but you have the same problem creating the unique index
- ORA-03150: end-of-file on communication channel for database link
ORA-03150: end-of-file on communication channel for database link Asked 7 years, 6 months ago Modified 2 months ago Viewed 53k times
- ORA-01400: cannot insert NULL when inserting value into Oracle Database
ORA-01400: cannot insert NULL when inserting value into Oracle Database Asked 3 years, 7 months ago Modified 3 years, 7 months ago Viewed 7k times
- sql - ORA-12560: TNS:protocol adaptor error - Stack Overflow
-2 In my case, (ORA-12560: TNS protocol adapter error)Issue cause of database connection issue like database, user name and password Once you got the issue Initially you have to check connection details, after check the oracle service and further more
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