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Updating a NUMBER datatype with a decimal value in Oracle

Posted on 2014-10-22
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Last Modified: 2014-10-23
How do I update a datatype NUMBER with a decimal value?

UPDATE myTable SET myNumberVal=0.07

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and

UPDATE myTable SET myNumberVal='0.07'

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both result in the value being updated as "0"
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Question by:Mike Miller
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slightwv (䄆 Netminder) earned 500 total points
ID: 40397833
The first one is correct.  If you cannot see the decimal places it is one of two issues:
The table does not allow decimal places or what you are using to query it isn't showing them.

Post the results of:
desc myTable ;


If the column is a whole number like number(10), then you cannot store decimals.

It would need to be defined as something like number(12,2).
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 40398138
Here it is in action:
SQL> drop table tab1 purge;

Table dropped.

SQL> create table tab1(col1 number);

Table created.

SQL>
SQL> insert into tab1 values(.07);

1 row created.

SQL> select * from tab1;

      COL1
----------
       .07

SQL> rollback;

Rollback complete.

SQL>
SQL> alter table tab1 modify col1 number(10);

Table altered.

SQL> insert into tab1 values(.07);

1 row created.

SQL> select * from tab1;

      COL1
----------
         0

SQL> rollback;

Rollback complete.

SQL>
SQL> alter table tab1 modify col1 number(12,2);

Table altered.

SQL> insert into tab1 values(.07);

1 row created.

SQL> select * from tab1;

      COL1
----------
       .07

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Author Closing Comment

by:Mike Miller
ID: 40399420
That's what it was. I copied this table from another server and the precision/scale didn't copy over with it. Thanks!
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