假设我有2个表：test_runs，test_run_status
test_runs：
|id |name| imported_at |
|----|----|--------------------|
|1 | A | 2017-01-07 00:00:00|
|2 | B | 2017-01-07 00:00:00|
|3 | A | 2017-01-08 00:00:00|
|4 | B | 2017-01-08 00:00:00|
|5 | A | 2017-01-09 00:00:00|
|6 | B | 2017-01-09 00:00:00|
test_run_status：
|test_run_id | passed | failed|
|------------|--------|-------|
|1 | 20 | 0 |
|2 | 5 | 0 |
|3 | 19 | 1 |
|4 | 5 | 0 |
|5 | 18 | 2 |
|6 | 4 | 1 |
写完一个简单的连接查询后，我得到了结果
Select test_runs.name ,test_run_status.passed date(test_runs.imported_at)
from test_runs , test_run_status
where test_runs.id=test_run_status.test_run_id
order by test_runs.source_file;
|Name | Passed | Date |
|-----|-----------|-----------|
| A | 20 | 2017-01-07|
| A | 19 | 2017-01-08|
| A | 18 | 2017-01-09|
| B | 5 | 2017-01-07|
| B | 5 | 2017-01-08|
| B | 4 | 2017-01-09|
但我希望将数据显示为
|Name | 2017-01-09 | 2017-01-08 | 2017-01-07|
|-----|------------|------------|-----------|
| A | 20 | 19 | 18 |
| B | 5 | 5 | 4 |