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法律研究MySQL 查询如何查找过去一小时内修改的表？
借助 INFORMATION_SCHEMA.TABLES 可以实现此操作。将 date_sub() 与间隔一起使用。语法如下所示：-
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE DATE_SUB(NOW(), INTERVAL -1HOUR) < ‘UPDATE_TIME’;
现在可以检查上面的语法。以下查询用于查找在过去一小时中修改的表格：-
mysql> select table_name from `INFORMATION_SCHEMA`.`TABLES` -> WHERE -> DATE_SUB(NOW(), INTERVAL 1 HOUR) < `UPDATE_TIME`;
输出
+---------------------+ | TABLE_NAME | +---------------------+ | innodb_table_stats | | innodb_index_stats | | employeeinformation | +---------------------+ 3 rows in set (0.37 sec)
上面的查询只选择表名。如果需要表架构、表类型等信息，您需要使用以下查询。该查询显示过去一小时中修改的表格：-
mysql> SELECT * -> FROM `INFORMATION_SCHEMA`.`TABLES` -> WHERE -> DATE_SUB(NOW(), INTERVAL 1 HOUR) < `UPDATE_TIME`;
以下是输出，显示过去一小时中修改的表信息：-
+---------------+--------------+---------------------+------------+--------+---------+------------+------------+----------------+-------------+-----------------+--------------+-----------+----------------+---------------------+---------------------+------------+--------------------+----------+---------------------------------------+---------------+ | 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)
更新于：2019 年 7 月 30 日
373 次浏览
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