Developer Explores SQL DDL Commands ALTER TABLE and TRUNCATE on Day 83 of MERN Journey

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A developer on a 100-day full-stack learning streak reached Day 83, focusing on Data Definition Language (DDL) commands in SQL. After previously working with DML operations like UPDATE and DELETE, the learner shifted to modifying table structures using ALTER TABLE and TRUNCATE TABLE. ALTER TABLE was used to add, drop, modify, and rename columns without losing existing data, enabling real-time schema evolution. TRUNCATE TABLE was studied as a faster alternative to DELETE, as it instantly clears all rows by resetting the storage layout while preserving the table structure. The session highlighted how these commands address common real-world needs such as adding new columns or clearing staging data efficiently.

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