To answer your question, you would need to write a SQL query. Here's a step-by-step guide on how to do it:

1. First, you need to join the `meter` and `electricity_reading` tables. You can do this using the `JOIN` clause in SQL. The `JOIN` clause combines rows from two or more tables based on a related column between them.

2. Next, you need to find the minimum `total_units` during 9PM. You can do this using the `MIN` function in SQL. The `MIN` function returns the smallest value of the selected column.

3. Then, you need to group the results by `meter_number`. You can do this using the `GROUP BY` clause in SQL. The `GROUP BY` statement groups rows that have the same values in specified columns into aggregated data.

4. Finally, you need to order the results in ascending order based on `meter_number`. You can do this using the `ORDER BY` clause in SQL. The `ORDER BY` keyword sorts the records in ascending order by default.

Here's how the SQL query might look like:

```sql
SELECT m.meter_number, MIN(e.h21) as min_total_units
FROM meter m
JOIN electricity_reading e ON m.meter_number = e.meter_number
GROUP BY m.meter_number
ORDER BY m.meter_number ASC;
```

This query selects the `meter_number` from the `meter` table and the minimum `total_units` during 9PM from the `electricity_reading` table. It then groups the results by `meter_number` and orders them in ascending order based on `meter_number`.

Please replace `m` and `e` with your actual table names and also replace `h21` with the actual column name that represents the 9PM reading.

Question

To answer your question, you would need to write a SQL query. Here's a step-by-step guide on how to do it:

1. First, you need to join the `meter` and `electricity_reading` tables. You can do this using the `JOIN` clause in SQL. The `JOIN` clause combines rows from two or more tables based on a related column between them.

2. Next, you need to find the minimum `total_units` during 9PM. You can do this using the `MIN` function in SQL. The `MIN` function returns the smallest value of the selected column.

3. Then, you need to group the results by `meter_number`. You can do this using the `GROUP BY` clause in SQL. The `GROUP BY` statement groups rows that have the same values in specified columns into aggregated data.

4. Finally, you need to order the results in ascending order based on `meter_number`. You can do this using the `ORDER BY` clause in SQL. The `ORDER BY` keyword sorts the records in ascending order by default.

Here's how the SQL query might look like:

```sql
SELECT m.meter_number, MIN(e.h21) as min_total_units
FROM meter m
JOIN electricity_reading e ON m.meter_number = e.meter_number
GROUP BY m.meter_number
ORDER BY m.meter_number ASC;
```

This query selects the `meter_number` from the `meter` table and the minimum `total_units` during 9PM from the `electricity_reading` table. It then groups the results by `meter_number` and orders them in ascending order based on `meter_number`.

Please replace `m` and `e` with your actual table names and also replace `h21` with the actual column name that represents the 9PM reading.

Knowee AI · Accepted Answer

To answer your question, you would need to write a SQL query. Here's a step-by-step guide on how to do it:

1. First, you need to join the `meter` and `electricity_reading` tables. You can do this using the `JOIN` clause in SQL. The `JOIN` clause combines rows from two or more tables based on a related column between them.

2. Next, you need to find the minimum `total_units` during 9PM. You can do this using the `MIN` function in SQL. The `MIN` function returns the smallest value of the selected column.

3. Then, you need to group the results by `meter_number`. You can do this using the `GROUP BY` clause in SQL. The `GROUP BY` statement groups rows that have the same values in specified columns into aggregated data.

4. Finally, you need to order the results in ascending order based on `meter_number`. You can do this using the `ORDER BY` clause in SQL. The `ORDER BY` keyword sorts the records in ascending order by default.

Here's how the SQL query might look like:

```sql
SELECT m.meter_number, MIN(e.h21) as min_total_units
FROM meter m
JOIN electricity_reading e ON m.meter_number = e.meter_number
GROUP BY m.meter_number
ORDER BY m.meter_number ASC;
```

This query selects the `meter_number` from the `meter` table and the minimum `total_units` during 9PM from the `electricity_reading` table. It then groups the results by `meter_number` and orders them in ascending order based on `meter_number`.

Please replace `m` and `e` with your actual table names and also replace `h21` with the actual column name that represents the 9PM reading.

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