SQL Taskbook Level 1.7
Given a table:
| id | date | temperature |
|---|---|---|
| 1 | 2010-12-01 | -15 |
| 2 | 2010-12-02 | 0 |
| 3 | 2010-06-01 | 15 |
| 3 | 2010-08-01 | -30 |
Solve the following tasks for it:
Find the sum of the temperature column from this table and make it a positive number.
Select all columns from this table and also select the signs of the temperature column.
