小编tac*_*omi的帖子

有没有办法在单个命令中列出所有带有表的数据库？

期待：

mysql> SHOW DATABASES, TABLES;

    DB1 table1
        table2
    DB2 table1
        table2
        table3
        table4
        table5
    DB3 table1
        table2

我有这个查询：

SELECT YEAR(datetime) AS Year, WEEK(datetime) AS Week, COUNT(*) AS total
FROM table
GROUP BY Year, Week;

结果是：

+------+------+-------+
| Year | Week | total |
+------+------+-------+
| 2016 |   49 |    14 |
| 2016 |   50 |    20 |
| 2016 |   51 |    19 |
| 2016 |   52 |    15 |
| 2017 |    1 |    13 |
| 2017 |    2 |    14 |
| 2017 |    3 |    12 |
| 2017 |    4 …