-- Problem Statement: show the unique ID of each user, If a user does not have a unique ID replace just show null. -- Return the result table in any order.
SELECT duckdb_tables.schema_name, duckdb_tables.table_name, column_name FROM duckdb_tables JOIN duckdb_columns USING (table_oid); SELECT duckdb_tables.schema_name, duckdb_tables.table_name, ...
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