从select db_name, table_name from verify_app.verify_result where compare_result = 0;查找库名和表名 然后依次读取库名到 'use db_name;truncate table table_name; '的shell脚本

您的问题是如何使用查询结果在Shell脚本中动态操作数据库表。

您可以使用以下Shell脚本：

#!/bin/bash

# 连接数据库
mysql -h <host> -u <username> -p<password> << EOF

# 查询需要操作的表
SELECT CONCAT('USE ',db_name,'; TRUNCATE TABLE ',table_name,';') AS cmd FROM verify_app.verify_result WHERE compare_result = 0;

EOF

这个脚本会先连接数据库，然后执行查询语句，将查询结果转换为需要执行的SQL语句，最后执行这些SQL语句。

需要注意的是，您需要将`<host>`、`<username>`、`<password>`替换为您的数据库连接信息。同时，由于查询结果中包含了需要执行的SQL语句，因此您需要保证查询结果中的表名、库名等信息没有被注入攻击者的恶意代码。

相关问题

cannot import name 'inception_resnet_v2' from 'tf_slim.nets'

The error message you encountered suggests that there is an issue with importing the `inception_resnet_v2` function from the `tf_slim.nets` module. This error can occur due to a few reasons:

1. Version compatibility: Make sure you have the correct version of TensorFlow and tf-slim installed. Some versions may not include the `inception_resnet_v2` function.

2. Missing package: Ensure that you have installed the necessary dependencies. In this case, make sure you have installed the `tf_slim` package.

3. Incorrect import statement: Double-check that you are importing the function correctly. The import statement should look like this:

from tf_slim.nets import inception_resnet_v2

4. File path issues: Verify that the `tf_slim.nets` module is accessible from your current working directory or the Python path.

If none of these solutions resolve the issue, please provide more details about your setup, including the versions of TensorFlow and tf-slim you are using, and any relevant code snippets.

sys.dm_db_index_operational_stats 举例说明如何使用

sys.dm_db_index_operational_stats是一个动态管理视图，它提供了有关索引操作的统计信息。可以使用它来监视和诊断索引操作的性能问题。

以下是使用sys.dm_db_index_operational_stats的示例：

1. 查询所有数据库中的所有表的操作统计信息：

SELECT DB_NAME(database_id) AS database_name, 
       OBJECT_NAME(object_id) AS table_name, 
       index_id, 
       page_id, 
       page_type_desc, 
       record_count, 
       min_record_size_in_bytes, 
       max_record_size_in_bytes, 
       avg_record_size_in_bytes, 
       forwarded_record_count, 
       compressed_page_size_in_bytes, 
       uncompressed_page_size_in_bytes, 
       page_level_lock_promotions, 
       page_compression_attempt_count, 
       page_compression_success_count, 
       page_split_count, 
       page_ghost_record_count, 
       page_verify_failure_count 
FROM sys.dm_db_index_operational_stats(NULL,NULL,NULL,NULL) 
WHERE database_id > 4

2. 查询特定表的操作统计信息：

SELECT index_id, 
       page_id, 
       page_type_desc, 
       record_count, 
       min_record_size_in_bytes, 
       max_record_size_in_bytes, 
       avg_record_size_in_bytes, 
       forwarded_record_count, 
       compressed_page_size_in_bytes, 
       uncompressed_page_size_in_bytes, 
       page_level_lock_promotions, 
       page_compression_attempt_count, 
       page_compression_success_count, 
       page_split_count, 
       page_ghost_record_count, 
       page_verify_failure_count 
FROM sys.dm_db_index_operational_stats(DB_ID('AdventureWorks2019'), 
                                         OBJECT_ID('Sales.Customer'),NULL,NULL) 
WHERE index_level = 0

这将返回Sales.Customer表的所有索引的操作统计信息。可以通过指定索引ID来查询特定索引的操作统计信息。