: Likely a version number or a specific schema identifier (Schema #136).

: For a file of this scale, the modern engineer bypasses standard text editors. They turn to tools like head or awk in the terminal to peek at the headers without loading the entire mass into memory. 3. Data Ingestion Strategies

: If the goal is database testing (PostgreSQL or MySQL), the COPY command is the scalpel of choice, bypassing individual INSERT statements to populate tables in a heartbeat.

: If the internal file is a flat CSV, a simple unzip command might expand a 50MB archive into a 1GB monster.