diff --git a/demos/betting-behavior-analysis.mdx b/demos/betting-behavior-analysis.mdx
index 5a1bbe00..5c906ed0 100644
--- a/demos/betting-behavior-analysis.mdx
+++ b/demos/betting-behavior-analysis.mdx
@@ -46,7 +46,7 @@ Once RisingWave is installed and deployed, run the three SQL queries below to se
         bet_amount FLOAT,
         result VARCHAR,
         profit_loss FLOAT, 
-        timestamp TIMESTAMP
+        timestamp TIMESTAMPTZ
     );
     ```
 
@@ -62,7 +62,7 @@ Once RisingWave is installed and deployed, run the three SQL queries below to se
         expected_return FLOAT,
         current_odds FLOAT,
         profit_loss FLOAT,
-        timestamp TIMESTAMP
+        timestamp TIMESTAMPTZ
     );
     ```
 
diff --git a/demos/inventory-management-forecast.mdx b/demos/inventory-management-forecast.mdx
index df70a0b1..6423cd61 100644
--- a/demos/inventory-management-forecast.mdx
+++ b/demos/inventory-management-forecast.mdx
@@ -27,7 +27,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
     CREATE TABLE inventory (
         warehouse_id INT,
         product_id INT,
-        timestamp TIMESTAMP,
+        timestamp TIMESTAMPTZ,
         stock_level INT,
         reorder_point INT,
         location VARCHAR
@@ -41,7 +41,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
         warehouse_id INT,
         product_id INT,
         quantity_sold INT,
-        timestamp TIMESTAMP
+        timestamp TIMESTAMPTZ
     );
     ```
 
diff --git a/demos/market-data-enrichment.mdx b/demos/market-data-enrichment.mdx
index dba17cb4..cd858b9c 100644
--- a/demos/market-data-enrichment.mdx
+++ b/demos/market-data-enrichment.mdx
@@ -26,11 +26,11 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
     ```sql
     CREATE TABLE raw_market_data (
         asset_id INT,
-        timestamp TIMESTAMP,
-        price FLOAT,
+        timestamp TIMESTAMPTZ,
+        price NUMERIC,
         volume INT,
-        bid_price FLOAT,
-        ask_price FLOAT
+        bid_price NUMERIC,
+        ask_price NUMERIC
     );
     ```
 2. The table `enrichment_data` contains external data that adds context to the raw market data. It includes additional metrics such as historical volatility, sector performance, and sentiment scores.
@@ -39,10 +39,10 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
     CREATE TABLE enrichment_data (
         asset_id INT,
         sector VARCHAR,
-        historical_volatility FLOAT,
-        sector_performance FLOAT,
-        sentiment_score FLOAT,
-        timestamp TIMESTAMP
+        historical_volatility NUMERIC,
+        sector_performance NUMERIC,
+        sentiment_score NUMERIC,
+        timestamp TIMESTAMPTZ
     );
     ```
 
diff --git a/demos/market-trade-surveillance.mdx b/demos/market-trade-surveillance.mdx
index 691fb47a..cb9a3ae2 100644
--- a/demos/market-trade-surveillance.mdx
+++ b/demos/market-trade-surveillance.mdx
@@ -27,7 +27,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
     CREATE TABLE trade_data (
         trade_id INT,
         asset_id INT,
-        timestamp TIMESTAMP,
+        timestamp TIMESTAMPTZ,
         price NUMERIC,
         volume INT,
         buyer_id INT,
@@ -40,7 +40,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
     ```sql
     CREATE TABLE market_data (
         asset_id INT,
-        timestamp TIMESTAMP,
+        timestamp TIMESTAMPTZ,
         bid_price NUMERIC,
         ask_price NUMERIC,
         price NUMERIC,
diff --git a/demos/sports-risk-profit-analysis.mdx b/demos/sports-risk-profit-analysis.mdx
index 64dd7ddf..7b1f0437 100644
--- a/demos/sports-risk-profit-analysis.mdx
+++ b/demos/sports-risk-profit-analysis.mdx
@@ -28,7 +28,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
         position_id INT,
         league VARCHAR,
         position_name VARCHAR,
-        timestamp TIMESTAMP,
+        timestamp TIMESTAMPTZ,
         stake_amount FLOAT,
         expected_return FLOAT,
         max_risk FLOAT,
@@ -47,7 +47,7 @@ Once RisingWave is installed and deployed, run the two SQL queries below to set
         bookmaker VARCHAR,
         market_price FLOAT,
         volume INT,
-        timestamp TIMESTAMP
+        timestamp TIMESTAMPTZ
     );
     ```