What is the difference between decimal and numeric in a database?

In databases, decimal and numeric are both data types used to store precise decimal numbers. The main difference between them is very subtle and primarily depends on the specific database implementation.

In most databases, decimal and numeric can be used interchangeably without any noticeable difference. Their main features include:

1. Storage precision: decimal and numeric can store numbers with fixed precision and decimal places. For example, a decimal(10,2) can store up to 10 digits, with 2 of them being decimal places.
2. Storage space for decimal and numeric types depends on the specified precision and scale. Smaller precision and scale can use less storage space.

While decimal and numeric are often the same in most cases, there may be subtle differences in some databases. For example, some databases may use different algorithms internally to handle these two types, or there may be slight variations in their behavior and limitations. When using these data types, it is best to refer to the specific database documentation to understand their specific behaviors and differences.