Based on your requirements, you can use a LEFT JOIN to combine the staff and subject tables. This type of join returns all the records from the left table (staff), and the matched records from the right table (subject). If there is no match, the result is NULL on the right side. Here is the SQL query:

```sql
SELECT staff.staff_name, subject.subject_name, subject.subject_code
FROM staff
LEFT JOIN subject ON staff.staff_id = subject.staff_id
ORDER BY staff.staff_name ASC;
```

Here's the step-by-step breakdown:

1. `SELECT staff.staff_name, subject.subject_name, subject.subject_code`: This line is selecting the columns you want to display in your final result.

2. `FROM staff`: This line is specifying the main table you are selecting from, which is the staff table.

3. `LEFT JOIN subject ON staff.staff_id = subject.staff_id`: This line is joining the subject table with the staff table based on the matching staff_id in both tables. It's a LEFT JOIN, so all staff will be included even if they don't have a matching record in the subject table.

4. `ORDER BY staff.staff_name ASC`: This line is ordering the final result in ascending order based on the staff_name column.

Question

Based on your requirements, you can use a LEFT JOIN to combine the staff and subject tables. This type of join returns all the records from the left table (staff), and the matched records from the right table (subject). If there is no match, the result is NULL on the right side. Here is the SQL query:

```sql
SELECT staff.staff_name, subject.subject_name, subject.subject_code
FROM staff
LEFT JOIN subject ON staff.staff_id = subject.staff_id
ORDER BY staff.staff_name ASC;
```

Here's the step-by-step breakdown:

1. `SELECT staff.staff_name, subject.subject_name, subject.subject_code`: This line is selecting the columns you want to display in your final result.

2. `FROM staff`: This line is specifying the main table you are selecting from, which is the staff table.

3. `LEFT JOIN subject ON staff.staff_id = subject.staff_id`: This line is joining the subject table with the staff table based on the matching staff_id in both tables. It's a LEFT JOIN, so all staff will be included even if they don't have a matching record in the subject table.

4. `ORDER BY staff.staff_name ASC`: This line is ordering the final result in ascending order based on the staff_name column.

Knowee AI · Accepted Answer

Based on your requirements, you can use a LEFT JOIN to combine the staff and subject tables. This type of join returns all the records from the left table (staff), and the matched records from the right table (subject). If there is no match, the result is NULL on the right side. Here is the SQL query:

```sql
SELECT staff.staff_name, subject.subject_name, subject.subject_code
FROM staff
LEFT JOIN subject ON staff.staff_id = subject.staff_id
ORDER BY staff.staff_name ASC;
```

Here's the step-by-step breakdown:

1. `SELECT staff.staff_name, subject.subject_name, subject.subject_code`: This line is selecting the columns you want to display in your final result.

2. `FROM staff`: This line is specifying the main table you are selecting from, which is the staff table.

3. `LEFT JOIN subject ON staff.staff_id = subject.staff_id`: This line is joining the subject table with the staff table based on the matching staff_id in both tables. It's a LEFT JOIN, so all staff will be included even if they don't have a matching record in the subject table.

4. `ORDER BY staff.staff_name ASC`: This line is ordering the final result in ascending order based on the staff_name column.

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