Question

Which language is commonly used for querying attribute data in GIS databases?

• A. HTML
• B. Python
• C. Structured Query Language (SQL)
• D. Java Script

Hint:

Remember: \[ \boxed{ \text{GIS Attribute Tables} \Longleftrightarrow \text{SQL Queries} } \] SQL = Structured Query Language.

Answer 1

The Correct Option is C

Concept: GIS databases commonly use Relational Database Management Systems (RDBMS), where attribute information is stored in tables. The standard language used to retrieve and manipulate these records is SQL.

Step 1: Understand SQL. SQL is used to
• Retrieve records
• Filter data
• Update tables
• Join multiple tables Example: \[ \boxed{ \texttt{SELECT * FROM Roads WHERE Width > 20;} } \]

Step 2: Evaluate the options.
• HTML is used for web pages.
• Python is a programming language.
• SQL is the standard database query language.
• JavaScript is used mainly for web scripting. Hence, \[ \boxed{\text{SQL is the standard language for querying GIS attribute databases.}} \] Therefore, the correct option is \[ \boxed{(C).} \]