MySQL查询来查找在最近一小时内修改过的表？
您可以借助INFORMATION_SCHEMA.TABLES来实现。使用带有间隔的date_sub()。语法如下-
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE DATE_SUB(NOW(), INTERVAL -1HOUR) < ‘UPDATE_TIME’;
现在您可以检查上面的语法。这是查找最近一小时修改的表的查询-
mysql> select table_name from `INFORMATION_SCHEMA`.`TABLES` -> WHERE -> DATE_SUB(NOW(), INTERVAL 1 HOUR) < `UPDATE_TIME`;
输出结果
+---------------------+ | TABLE_NAME | +---------------------+ | innodb_table_stats | | innodb_index_stats | | employeeinformation | +---------------------+ 3 rows in set (0.37 sec)
上面的查询仅选择表名。如果您需要表架构，表类型等信息，则需要使用以下查询。查询显示最近一小时修改的表-
mysql> SELECT * -> FROM `INFORMATION_SCHEMA`.`TABLES` -> WHERE -> DATE_SUB(NOW(), INTERVAL 1 HOUR) < `UPDATE_TIME`;
以下是显示最近一小时修改的表信息的输出-
+---------------+--------------+---------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+---------------------------------------+---------------+ | TABLE_CATALOG | TABLE_SCHEMA | TABLE_NAME | TABLE_TYPE | ENGINE | VERSION | ROW_FORMAT | TABLE_ROWS | AVG_ROW_LENGTH | DATA_LENGTH | MAX_DATA_LENGTH | INDEX_LENGTH | DATA_FREE | AUTO_INCREMENT | CREATE_TIME | UPDATE_TIME | CHECK_TIME | TABLE_COLLATION | CHECKSUM | CREATE_OPTIONS | TABLE_COMMENT | +---------------+--------------+---------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+---------------------------------------+---------------+ | def | mysql | innodb_table_stats | BASE TABLE | InnoDB | 10 | Dynamic | 449 | 145 | 65536 | 0 | 0 | 4194304 | NULL | 2018-09-22 20:37:26 | 2018-12-24 15:13:41 | NULL | utf8_bin | NULL | row_format=DYNAMIC stats_persistent=0 | | | def | mysql | innodb_index_stats | BASE TABLE | InnoDB | 10 | Dynamic | 1413 | 243 | 344064 | 0 | 0 | 4194304 | NULL | 2018-09-22 20:37:26 | 2018-12-24 15:13:41 | NULL | utf8_bin | NULL | row_format=DYNAMIC stats_persistent=0 | | | def | test | employeeinformation | BASE TABLE | InnoDB | 10 | Dynamic | 6 | 2730 | 16384 | 0 | 0 | 0 | NULL | 2018-12-24 15:12:04 | 2018-12-24 15:14:00 | NULL | utf8mb4_0900_ai_ci | NULL | | | +---------------+--------------+---------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+---------------------------------------+---------------+ 3 rows in set (43.72 sec)