QueryQQ11Write a query to display the meter_number from the meter table which got maximum total_units during 8PM for a day in the electricity_reading.Note:1. Display only the meter_number from the meter table which got maximum total_units during 8PM for a day in the electricity_reading. ( 8PM reading will be in h20 column).2. Tables involved are meter and electricity_reading3. Compare your executed result with the sample output given below.
Question
QueryQQ11Write a query to display the meter_number from the meter table which got maximum total_units during 8PM for a day in the electricity_reading.Note:1. Display only the meter_number from the meter table which got maximum total_units during 8PM for a day in the electricity_reading. ( 8PM reading will be in h20 column).2. Tables involved are meter and electricity_reading3. Compare your executed result with the sample output given below.
Solution
It seems like you want to write a SQL query to find the meter_number with the maximum total_units at 8PM. Here's how you can do it:
SELECT m.meter_number
FROM meter m
JOIN electricity_reading e
ON m.meter_id = e.meter_id
WHERE e.h20 = (
SELECT MAX(h20)
FROM electricity_reading
)
This query works as follows:
- It joins the
metertable with theelectricity_readingtable on themeter_idfield. - It then selects the
meter_numberfrom themetertable where theh20field in theelectricity_readingtable is equal to the maximumh20value in theelectricity_readingtable.
Please replace meter_id, meter_number, and h20 with your actual column names if they are different.
Similar Questions
Write a query to display the meter_number from the meter table which got maximum total_units during 8PM for a day in the electricity_reading.
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