ORA-02287: sequence number not allowed here

问题

I trying to insert data from one table to other table and using a sequence while but I'm getting the sequence not allowed here error on Oracle 12c.

INSERT INTO table_a
(a,b,c,d)
    SELECT
        schema.table_a_seq.nextval,
        t.col1,
        t.col2,
        t.col3
    FROM
        (
            SELECT col1, col2, col3 FROM table_b
        )t;

回答1:

I couldn't reproduce the error, However I have changed your query to-

INSERT INTO table_a 
SELECT table_a_seq.nextval, t.* 
FROM (SELECT col1 FROM table_b) t;

And its working fine for me. You might have missed some part of the query to include here in the question.

The ORA-02287 can be raised if you used the sequence in the following part of SELECT statement.

In a WHERE clause

In a GROUP BY or ORDER BY clause

In a DISTINCT clause

Along with a UNION or INTERSECT or MINUS

In a sub-query

Reference:OraFAQ:ORA-02287

SQL> desc table_a
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 COL1                                               NUMBER
 COL2                                               NUMBER

SQL> desc table_b
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 COL1                                               NUMBER
 COL2                                               NUMBER

SQL> select * from table_a;

no rows selected

SQL> select * from table_b;

      COL1       COL2
---------- ----------
         2          3
         4          5


SQL> INSERT INTO table_a SELECT table_a_seq.nextval, t.* FROM (SELECT col1 FROM table_b) t;

2 rows created.

SQL> select * from table_a;

      COL1       COL2
---------- ----------
         3          2
         4          4

回答2:

I didn't see the error When I tried to use the schema name before every object in the SQL query.

INSERT INTO schema.table_a
(a,b,c,d)
SELECT
    schema.table_a_seq.nextval,
    t.col1,
    t.col2,
    t.col3
FROM
    (
        SELECT col1, col2, col3 FROM schema.table_b
    )t;

来源：https://stackoverflow.com/questions/41155090/ora-02287-sequence-number-not-allowed-here