Oracle Learning Record errors

1. invalididentifier adds a comma at the end.

2. Change missingkeywordsreference to references.

3. missingrightparenthesisdefaultnotnullunique should be placed before the constraint

4. ORA-009922: missingorinvalidoptionaltersessionsetnls_date_formate ='

Yyyy-mm-dd'; format is incorrect.

5. Single line comment-multi-line comment /**/

6. pl/SQL shows that data is successfully inserted but cannot be queried. Press f8 to execute the transaction, and add the commit or click submit button to a green downward arrow (F10). When no transaction is committed, it is grayed out. The red up arrow next to it shows the rollback button.

However, if you insert and query data in a sqlw.wn, you can find the data. However, if you right-click the inserted data on the table name and select Querydata to query the data, because a sqlw.wn is opened again, this session has changed, and the sqlw.wn session you inserted has not been submitted, and you will not be able to see it in the new session.

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