Fix group by

[scsmithr]

     Running `target/debug/rayexec_bin ' SELECT 
        COUNT(sales.sale_date),
        lookup.borough_name
    FROM 
        '\''https://raw.githubusercontent.com/GlareDB/tutorial_data/main/nyc_sales/sale_year%3D2022/sale_month%3D1/f55363e2587849bcb25c057be706c69d-0.parquet'\'' sales
    JOIN 
        read_postgres(
            '\''postgresql://demo:[email protected]:5432/postgres'\'', 
            '\''public'\'',
            '\''borough_lookup'\''
        ) lookup
    ON sales.borough = lookup.borough_id
    GROUP BY lookup.borough_name
'`
┌───────┬──────────────┐
│ count │ borough_name │
│ Int64 │ Utf8         │
├───────┼──────────────┤
│  1683 │ QUEENS       │
│  2429 │ MANHATTAN    │
│   781 │ STATEN ISLA… │
│  2270 │ BROOKLYN     │
│   581 │ BRONX        │
└───────┴──────────────┘

Should be

1683 MANHATTAN
581  BRONX
2270 BROOKLYN
2429 QUEENS
781  STATEN ISL