Using default values for a column
Hi,
I am using PL/SQL Developer, where for some columns in a table I've defined 0 as default value.
After running some queries on the table (insert,update) I realized that all the columns that are supposed to have 0 value (default), actually have NULL value.
Please advice about possible reason.
Thanks
Hi,
You might have explicitly inserted a NULL value in those columns. Have a look at the below test case:
SQL> create table test(a number, b number default 0, c number default 1);
Table created.
SQL> insert into test (a) values (10);
1 row created.
SQL> select * from test;
A B C
10 0 1
SQL> insert into test (a, b) values (10, null);
1 row created.
SQL> select * from test;
A B C
10 0 1
10 1
SQL> insert into test (a, b, c) values (10, null, null);
1 row created.
SQL> select * from test;
A B C
10 0 1
10 1
10
SQL> insert into test (a) values (20);
1 row created.
SQL> select * from test;
A B C
10 0 1
10 1
10
20 0 1Regards
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