CSV in Databases: COPY, LOAD DATA INFILE, and Bulk Import Strategies
Load CSV files into databases using PostgreSQL COPY, MySQL LOAD DATA INFILE, and SQLite .import. Handle nulls, delimiters, and encoding issues.
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Tags: csv, database, import
CSV in Databases: COPY, LOAD DATA INFILE, and Bulk Import Strategies Loading CSV data into a database sounds straightforward until it isn't. Mismatched column counts, encoding issues, dates in five different formats, NULL represented as empty strings or the literal text "NULL" — all of these will silently corrupt data or blow up your import job. This guide covers the right way to do bulk CSV loading in PostgreSQL, MySQL, and SQLite, along with the staging table pattern for handling errors gracefully. MySQL: LOAD DATA INFILE MySQL's is the equivalent of PostgreSQL's COPY — a bulk loader that bypasses row-by-row INSERT overhead. Key clauses: — column delimiter — quoting character — line ending (use for Windows) — skip the header row Column list with — lets you transform values during load…
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