Does Oracle's NUMBER Data Type Preserve Trailing Zeroes?

Does Oracle Store Trailing Zeroes for Number Data Type?

When handling numeric values in Oracle, it is essential to understand how trailing zeroes are handled. Unlike certain programming languages, Oracle does not store trailing zeroes as part of the Number data type.

To clarify, when a numeric value is stored as a Number in Oracle, any trailing zeroes are omitted. This behavior is observed regardless of the precision of the specified NUMBER column.

Consider the following example:

create table decimal_test(decimal_field number(*,10));

insert into decimal_test(decimal_field) values(10);
insert into decimal_test(decimal_field) values(10.11);
insert into decimal_test(decimal_field) values(10.100);
insert into decimal_test(decimal_field) values(10.00);

select * from decimal_test;

The results will be:

10
10.11
10.1
10

As you can see, the trailing zeroes have been removed when stored in the table. This is because Oracle considers trailing zeroes as insignificant data.

In scenarios where trailing zeroes are crucial, such as financial calculations or data integration, it is recommended to use string representations of the numeric values. Additionally, consider setting the precision and scale of your NUMBER columns to match the expected data format, ensuring consistency and accuracy in your data handling.

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