???? ?? 0?? ???? ??? ?? ??? ???? ????
?? ?? ??? ?????:
SELECT 標(biāo)簽，COUNT(start) AS Anzahl，user_id FROM datensammlung 其中 (start='1') AND (user_id='1') GROUP BY label;
??? ??? ??? ????:
| ?? | ?? | ??? ID |
|---|---|---|
| 1_????? | 20 | 1 |
| 1_?? ????? | 20 | 1 |
??? ?? ??? ???:
| ?? | ?? | ??? ID |
|---|---|---|
| 1_????? | 20 | 1 |
| 1_?? ????? | 20 | 1 |
| 1_?? | 0 | 1 |
1
0
0
![[? ?????] Node.js ?? ??](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
