To retrieve unique 12th hour readings from the `electricity_reading` table and sort them in descending order based on `h12`, you can use the following SQL query:

```sql
SELECT DISTINCT h12
FROM electricity_reading
WHERE h12 IS NOT NULL
ORDER BY h12 DESC;
```

### Explanation of the Query:
1. **SELECT DISTINCT h12**: This clause selects unique values from the `h12` column.
2. **FROM electricity_reading**: Specifies the table from which to retrieve the data.
3. **WHERE h12 IS NOT NULL**: This condition ensures that only non-null readings are considered, as null values would not be meaningful in this context.
4. **ORDER BY h12 DESC**: This orders the unique 12th hour readings in descending order.

### Final Result
Executing this query will provide a list of unique 12th hour readings sorted from the highest to the lowest value.

Question

To retrieve unique 12th hour readings from the `electricity_reading` table and sort them in descending order based on `h12`, you can use the following SQL query:

```sql
SELECT DISTINCT h12
FROM electricity_reading
WHERE h12 IS NOT NULL
ORDER BY h12 DESC;
```

### Explanation of the Query:
1. **SELECT DISTINCT h12**: This clause selects unique values from the `h12` column.
2. **FROM electricity_reading**: Specifies the table from which to retrieve the data.
3. **WHERE h12 IS NOT NULL**: This condition ensures that only non-null readings are considered, as null values would not be meaningful in this context.
4. **ORDER BY h12 DESC**: This orders the unique 12th hour readings in descending order.

### Final Result
Executing this query will provide a list of unique 12th hour readings sorted from the highest to the lowest value.

Knowee AI · Accepted Answer

To retrieve unique 12th hour readings from the `electricity_reading` table and sort them in descending order based on `h12`, you can use the following SQL query:

```sql
SELECT DISTINCT h12
FROM electricity_reading
WHERE h12 IS NOT NULL
ORDER BY h12 DESC;
```

### Explanation of the Query:
1. **SELECT DISTINCT h12**: This clause selects unique values from the `h12` column.
2. **FROM electricity_reading**: Specifies the table from which to retrieve the data.
3. **WHERE h12 IS NOT NULL**: This condition ensures that only non-null readings are considered, as null values would not be meaningful in this context.
4. **ORDER BY h12 DESC**: This orders the unique 12th hour readings in descending order.

### Final Result
Executing this query will provide a list of unique 12th hour readings sorted from the highest to the lowest value.

Write a query to display unique 12th hour reading present in the electricity_reading table. Display the records sorted in descending order based on h12.

Question

Solution

Explanation of the Query:

Final Result

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