[minor][docs] Improve the answer of MySQL CDC FAQ docs

This closes  #3337.

docs/content.zh/docs/faq/faq.md

@@ -204,7 +204,8 @@ restart-strategy.fixed-delay.delay= 30s
 
 ### Q15: 在 DataStream API中构建MySQL CDC源时如何配置tableList选项？
 
-tableList选项要求表名使用数据库名，而不是DataStream API中的表名。对于MySQL CDC源代码，tableList选项值应该类似于‘my_db.my_table’。
+1. tableList选项要求表名使用数据库名，而不是DataStream API中的表名。对于MySQL CDC源代码，tableList选项值应该类似于‘my_db.my_table’。
+2. 如果要同步排除products和orders表之外的整个my_db库，tableList选项值应该类似于‘my_db.(?!products｜orders).*’。
 
 ## Postgres CDC FAQ
 

docs/content/docs/faq/faq.md

@@ -207,7 +207,8 @@ The reason for this problem is that the reading of the full volume phase of the
 
 ### Q15: How to config `tableList` option when build MySQL CDC source in DataStream API?
 
-The `tableList` option requires table name with database name rather than table name in DataStream API. For MySQL CDC source, the `tableList` option value should like ‘my_db.my_table’.
+1. The `tableList` option requires table name with database name rather than table name in DataStream API. For MySQL CDC source, the `tableList` option value should like ‘my_db.my_table’.
+2. If you need to synchronize the whole mydb database excluding the products and orders tables, the `tableList` option value should like 'my_db.(?!products｜orders).*'.
 
 ## Postgres CDC FAQ