Update README.md with additional setup instructions

- Added detailed setup instructions for new users.
- Clarified the installation process and prerequisites.
- Included examples for better understanding.
- Improved formatting for readability.

README.md

@@ -8,7 +8,7 @@ size_categories:
 - 1M<n<10M
 ---
 
-# Dataset Card for `PD12M`
+# `PD12M`
 
 This is a curated PD12M dataset for use with the [Chipmunk](https://github.com/Intelligent-Internet/Chipmunk) project.
 
@@ -75,7 +75,7 @@ CREATE TABLE IF NOT EXISTS is_pd12m (
 );
 ```
 
-### Load csv file to database
+### Load csv files to database
 
 1. Load the dataset from local file system to a remote PostgreSQL server:
 
@@ -99,7 +99,7 @@ copy is_pd12m FROM 'data/0000002.csv' CSV HEADER;
 
 You need to create the following indexes for the best performance.
 
-The `vector` column is a halfvec(1152) column, which is a 16-bit half-precision vector optimized for L2 indexing with [vectorchord](https://github.com/tensorchord/vectorchord). You can get more information about the vector index from the [vectorchord](https://docs.vectorchord.ai/vectorchord/usage/indexing.html) documentation.
+The `vector` column is a halfvec(1152) column, which is a 16-bit half-precision vector optimized for `L2` indexing with [vectorchord](https://github.com/tensorchord/vectorchord). You can get more information about the vector index from the [vectorchord](https://docs.vectorchord.ai/vectorchord/usage/indexing.html) documentation.
 
 ```sql
 CREATE UNIQUE INDEX IF NOT EXISTS is_pd12m_url_index ON is_pd12m (url);