refine blogs

Author: cyyeh

packages/doc/blog/query-data-from-the-internet-and-deliver-apis-in-no-time.mdx

@@ -35,8 +35,8 @@ and it currently supports RESTful APIs for the output part. As of the input, ple
 ## The Input Part: Data Sources
 
 VulcanSQL aims to help data professionals create and deliver data APIs in an easy way! 
-Originally, VulcanSQL supports data warehouses and some databases such as BigQuery, 
-Snowflake, ClickHouse and PostgreSQL, etc. However, as we share VulcanSQL to the world 
+Originally, VulcanSQL supports data warehouses and some databases such as [BigQuery](../docs/connectors/bigquery), 
+[Snowflake](../docs/connectors/snowflake), [ClickHouse](../docs/connectors/clickhouse) and [PostgreSQL](../docs/connectors/postgresql), etc. However, as we share VulcanSQL to the world 
 along the way, we figured out that there are also lots of data on the Internet that is not in databases 
 such as CSV files or data that lives in other people's databases!
 
@@ -48,13 +48,13 @@ As of now, VulcanSQL provides two mechanisms to help you get data from the Inter
 
 ### DuckDB and its httpfs extension
 
-In VulcanSQL, we can use [DuckDB](../docs/connectors/duckdb) as a caching layer to enhance query performance, or as a data connector. 
-For those of you who may not familiar with DuckDB, it is a high performance in-process OLAP database, 
+In VulcanSQL, we can use [DuckDB](../docs/connectors/duckdb) as a caching layer to [enhance query performance](./powering-rapid-data-apps-with-vulcansql), or as a data connector. 
+For those of you who may not be familiar with DuckDB, it is a high performance in-process OLAP database, 
 and has lots of extensions available! In order to get data from the Internet, VulcanSQL supports the httpfs extension!
 
 With the [httpfs extension](https://duckdb.org/docs/extensions/httpfs.html), now VulcanSQL can query CSV, JSON and Parquet files from the Internet!
 
-Imagine now you find some interesting dataset on the Internet, and it's a CSV file! Now you can directly query them
+Imagine now you find some interesting dataset on the Internet, and it's a CSV file! Now you can directly query it
 like the following SQL statement, then you can do some data transformation using SQL, and deliver APIs right away to share with others!
 
 ```sql
@@ -63,11 +63,14 @@ SELECT
 FROM 'https://www.stats.govt.nz/assets/Uploads/Annual-enterprise-survey/Annual-enterprise-survey-2021-financial-year-provisional/Download-data/annual-enterprise-survey-2021-financial-year-provisional-csv.csv'
 ```
 
+The image below shows the data details using VulcanSQL's [API Catalog feature](../docs/catalog/intro)
+![vulcansql-httpfs](./static/query-data-from-the-internet-and-deliver-apis-in-no-time/vulcansql-httpfs.png)
+
 If you would like to read the source code of the full example, please [check out here](https://github.com/Canner/vulcan-sql-examples/tree/main/read-data-from-internet)!
 
 ### The API Extension
 
-Sometimes, you may find some interesting data behind RESTful APIs created by others. VulcanSQL now has [the API extension](../docs/extensions/api) that
+Sometimes, you may find some interesting data from RESTful APIs created by others. VulcanSQL now has [the API extension](../docs/extensions/api) that
 allows you to query data from 3rd parties using RESTful APIs!
 
 In the following example, we call the RESTful API to `https://dummyjson.com` and search their products with a query string!
@@ -83,4 +86,4 @@ If you would like to read the source code of the full example, please [check out
 
 ## Conclusion
 
-We hope this blog post demonstrates how VulcanSQL can help you query data from the Internet, thus you can create and deliver APIs in no time!
+We hope this blog post demonstrates how VulcanSQL can help you query data from the Internet, thus you can create and deliver APIs in no time!

packages/doc/blog/querying-your-data-easily-and-smartly-through-huggingface.mdx

@@ -63,9 +63,9 @@ VulcanSQL currently integrates the table question answering feature by creating
 `huggingface_table_question_answering` and allows you to apply functions to variables using the 
 pipe operator (`|`).
 
-**Sample 1 - send the data from the variable [`set` tag](https://www.notion.so/VulcanSQL-edb87d04de074125ab19275e6f63d844?pvs=21):**
+**Sample 1 - send the data from the variable `set` tag:**
 
-You could give the dataset with the **[`set` tag](https://www.notion.so/VulcanSQL-edb87d04de074125ab19275e6f63d844?pvs=21)**
+You could give the dataset with the **`set` tag**
 and give the question with the `query` field:
 
 ```sql