Database Compare Tools

Parquet Diff

Compare two local Parquet files without converting to CSV: inspect field names, physical/logical types, repetition or nullability details, and row-group counts, then diff records by key columns, row order, or row-multiset hash.

left.parquet

right.parquet

schema + rows compared

added / removed / changed

diff report

SQL Schema Diff

Compare two SQL DDL schema definitions in a chosen dialect and review a change log of added, removed, and changed tables, columns, types, defaults, keys, constraints, indexes, and views.

CREATE TABLE users (

id INT

);

column added

created_at TIMESTAMP

schema change log