Hello,
When I export some selected data as spool text, some columns with NULL values are indicated as being “NAN”, some are not. What I did to reproduce this phenomenon, and the results:
CREATE TABLE x ( c1 NUMBER(1), c2 NUMBER(2), c3 NUMBER(9), c4 INTEGER, c5 NUMBER(4, 1));
INSERT INTO x VALUES (1, 1, 1, 1, 1);
INSERT INTO x VALUES (2, NULL, NULL, NULL, NULL);
INSERT INTO x VALUES (NULL, NULL, NULL, NULL, NULL);
SELECT * FROM x;
– CTRL-E in the results tab, Format: “Spool Text”
C1 C2 C3 C4 C5
1 1 1 1 1
2 NAN NAN
NAN NAN NAN