ALTER DDL कथन के संबंध में कौन सा विकल्प सही है? कथन-1: ALTER कमांड का उपयोग करके बेस टेबल या अन्य नामित स्कीमा तत्वों की परिभाषा को बदला नहीं जा सकता है। कथन-2: बेस टेबल के लिए, संभावित alter table क्रियाओं में कॉलम (गुण) जोड़ना या हटाना, कॉलम परिभाषा बदलना और टेबल बाधाओं (constraints) को जोड़ना या हटाना शामिल है।

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Data warehouses are designed to support strategic decision-making through integrated and historical data. Reason (R): Data warehouses primarily process day-to-day operational transactions in real time. In the light of the above statements, choose the most appropriate answer from the options given below:

Match LIST-I with LIST-II regarding NoSQL database types and their built-in primary indexing mechanisms: LIST-I (NoSQL Database Type) A. Key-Value Store B. Document Database C. Column-Family Store D. Graph Database LIST-II (Primary Indexing Mechanism) I. Partition key (hash) plus clustering columns II. Node labels with relationship types III. Hash-based index (O(1) lookup) IV. _id field (primary B-tree index) Choose the correct answer from the options given below: