Oracle data types: is there a built-in Currency/Money type?

Introduction / Context: Oracle supports numeric storage via the versatile NUMBER type. Monetary values are commonly stored as NUMBER with appropriate scale and formatting at the presentation layer. This question addresses a common misconception that there is a special Currency or Money data type in Oracle.

Given Data / Assumptions:

• Application must store monetary amounts in Oracle Database.
• NLS settings may control symbols and formats for display.
• Data integrity and precision are important.

Concept / Approach: Store currency amounts in NUMBER(p,s) (for example, NUMBER(19,4)) to allow needed precision. Present the value with a currency symbol using TO_CHAR with a format model (for example, L999G999D99) or in the application layer. There is no built-in MONEY/CURRENCY data type; therefore, the statement that “Money is defined with the Currency data type” is incorrect.

Step-by-Step Solution:

Verification / Alternative check: Querying USER_TAB_COLUMNS shows NUMBER as the underlying type. Display of currency symbols depends on NLS and format models, not on a special data type.

Why Other Options Are Wrong:

• Claiming a Currency type is false; XE and NLS do not add such a native type.
• Storing money as CHAR is poor practice and loses numeric semantics.

Common Pitfalls: Using FLOAT/DOUBLE (binary floating) for money; mixing currency symbol in stored values; ignoring rounding rules.

Final Answer: Invalid (Oracle has no Currency or Money data type; use NUMBER with formats)