Add new functions for workspaces sql docs

content/en/logs/workspaces/sql_reference.md

@@ -39,6 +39,13 @@ WHERE department = 'Sales' AND name LIKE 'J%' {{< /code-block >}} |
     ELSE 'Standard Order' 
   END AS order_type 
 FROM orders {{< /code-block >}} |
+| `WINDOW` | Performs performs a calculation across a set of table rows that are somehow related to the current row.                 | {{< code-block lang="sql" >}}SELECT
+  timestamp,
+  service_name,
+  cpu_usage_percent,
+  AVG(cpu_usage_percent) OVER (PARTITION BY service_name ORDER BY timestamp ROWS BETWEEN 2 PRECEDING AND CURRENT ROW) AS moving_avg_cpu
+FROM
+  cpu_usage_data {{< /code-block >}} |
 | Arithmetic Operations | Performs basic calculations using operators like `+`, `-`, `*`, `/`.                 | {{< code-block lang="sql" >}}SELECT price, tax, (price * tax) AS total_cost 
 FROM products {{< /code-block >}} |
 
@@ -60,7 +67,9 @@ The following SQL functions are supported:
 | `upper(string s)`      | string                        | Returns the string as uppercase.                                          |
 | `abs(numeric n)`       | numeric                       | Returns the absolute value.                                               |
 | `coalesce(args a)`     | typeof first non-null a OR null | Returns the first non-null value or null if all are null.               |
-
+| `cast(value AS type)`  | type                          | Converts the given value to the specified data type.                      |
+| `length(string s)`      | integer                       | Returns the number of characters in the string.                           |
+| `INTERVAL value unit`  | interval                      | Represents a time duration specified in a given unit.                     |
 
 
 {{% collapse-content title="Examples" level="h3" %}}
@@ -136,10 +145,34 @@ FROM accounts
 
 ### `COALESCE`  
 {{< code-block lang="sql" >}}
- SELECT COALESCE(phone_number, email) AS contact_info 
+SELECT COALESCE(phone_number, email) AS contact_info 
 FROM users 
 {{< /code-block >}} 
 
+### `CAST`  
+{{< code-block lang="sql" >}}
+SELECT
+  CAST(order_id AS VARCHAR) AS order_id_string,
+  'Order-' || CAST(order_id AS VARCHAR) AS order_label
+FROM
+  orders
+{{< /code-block >}} 
+
+### `LENGTH`  
+{{< code-block lang="sql" >}}
+SELECT
+  customer_name,
+  LENGTH(customer_name) AS name_length
+FROM
+  customers
+{{< /code-block >}} 
+
+### `INTERVAL`  
+{{< code-block lang="sql" >}}
+SELECT
+  TIMESTAMP '2023-10-01 10:00:00' + INTERVAL '30 days' AS future_date
+{{< /code-block >}} 
+
 {{% /collapse-content %}}