What does a column ending with _C indicate, and what must be done to understand its meaning?

What does a column ending with _C indicate, and what must be done to understand its meaning?

• A. The column is a primary key.
• B. The column is a timestamp.
• C. The column stores currency values.
• D. The column holds a category value. You'll need to link it to a ZC_ table to find what that category value means.

Answer: (D)

A column ending with _C represents a coded value from a predefined category or domain list, rather than a raw label. The actual meaning of that code isn’t stored in the column itself; you interpret it by looking up the corresponding row in a ZC_ code table. By joining the main table to the ZC_ table on the code, you retrieve the human-readable description (and any other attributes) that explain what that category value stands for. This is why the correct approach is to treat the column as storing a category code and perform a lookup in the ZC_ table to understand its meaning. The other possibilities don’t fit this pattern because they would typically be self-describing or require different structures (for example, a primary key, a timestamp, or a currency value) and wouldn’t normally require a separate lookup table to interpret.

A column ending with C represents a coded value from a predefined category or domain list, rather than a raw label. The actual meaning of that code isn’t stored in the column itself; you interpret it by looking up the corresponding row in a ZC code table. By joining the main table to the ZC_ table on the code, you retrieve the human-readable description (and any other attributes) that explain what that category value stands for. This is why the correct approach is to treat the column as storing a category code and perform a lookup in the ZC_ table to understand its meaning. The other possibilities don’t fit this pattern because they would typically be self-describing or require different structures (for example, a primary key, a timestamp, or a currency value) and wouldn’t normally require a separate lookup table to interpret.