A friend asked me a question about a database, as follows
Two tables, if you want the value of the bname field in B to equal the aname value of the corresponding id in the A table
Table A
| id | aname |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
Table B
| id | bname |
| 1 | |
| 2 | |
| 3 |
Please write the correct sql statement.
The answer I gave is as follows, the pro test can pass
UPDATE B LEFT JOIN A ON B.`id` = A.`id` SET B.`bname` = A.`aname`;