كيفية حساب نسبة القيم الفارغة/الصفرية في كل عمود في جدول

SELECT *
    APPLY x -> (x = defaultValueOfArgumentType(x)) APPLY avg APPLY x -> round(x, 3)
FROM table_name
FORMAT Vertical

SELECT *
    APPLY x -> (x = defaultValueOfArgumentType(x)) APPLY avg APPLY x -> round(x, 3)
FROM sensors
FORMAT Vertical

Row 1:
──────
round(avg(equals(sensor_id, defaultValueOfArgumentType(sensor_id))), 3):                 0
round(avg(equals(sensor_type, defaultValueOfArgumentType(sensor_type))), 3):             0.159
round(avg(equals(location, defaultValueOfArgumentType(location))), 3):                   0
round(avg(equals(lat, defaultValueOfArgumentType(lat))), 3):                             0.001
round(avg(equals(lon, defaultValueOfArgumentType(lon))), 3):                             0.001
round(avg(equals(timestamp, defaultValueOfArgumentType(timestamp))), 3):                 0
round(avg(equals(P1, defaultValueOfArgumentType(P1))), 3):                               0.474
round(avg(equals(P2, defaultValueOfArgumentType(P2))), 3):                               0.475
round(avg(equals(P0, defaultValueOfArgumentType(P0))), 3):                               0.995
round(avg(equals(durP1, defaultValueOfArgumentType(durP1))), 3):                         0.999
round(avg(equals(ratioP1, defaultValueOfArgumentType(ratioP1))), 3):                     0.999
round(avg(equals(durP2, defaultValueOfArgumentType(durP2))), 3):                         1
round(avg(equals(ratioP2, defaultValueOfArgumentType(ratioP2))), 3):                     1
round(avg(equals(pressure, defaultValueOfArgumentType(pressure))), 3):                   0.83
round(avg(equals(altitude, defaultValueOfArgumentType(altitude))), 3):                   1
round(avg(equals(pressure_sealevel, defaultValueOfArgumentType(pressure_sealevel))), 3): 1
round(avg(equals(temperature, defaultValueOfArgumentType(temperature))), 3):             0.532
round(avg(equals(humidity, defaultValueOfArgumentType(humidity))), 3):                   0.544

1 row in set. Elapsed: 992.041 sec. Processed 20.69 billion rows, 1.39 TB (20.86 million rows/s., 1.40 GB/s.)