Edits based on review comments

Author: vishalshah-dd

content/en/logs/workspaces/sql_reference.md

@@ -92,18 +92,18 @@ The following SQL functions are supported. For Window function, see the separate
 | `trim(string s)`                                 | string                                | Removes leading and trailing whitespace from the string.                    |
 | `replace(string s, string from, string to)`      | string                                | Replaces occurrences of a substring within a string with another substring. |
 | `substring(string s, int start, int length)`     | string                                | Extracts a substring from a string, starting at a given position and for a specified length. |
-| `strpos(string s, string substring)`             | integer                               | Returns the index position of the substring in a given string.              |
-| `split_part(string s, string delimiter, integer index)` | string                         | Splits the string on the given delimiter and returns the string as the given position counting from 1. |
+| `strpos(string s, string substring)`             | integer                               | Returns the first index position of the substring in a given string, or 0 if there is no match |
+| `split_part(string s, string delimiter, integer index)` | string                         | Splits the string on the given delimiter and returns the string at the given position counting from one. |
 | `extract(unit from timestamp/interval)`          | numeric                               | Extracts a part of a date or time field (such as year or month) from a timestamp or interval. |
 | `to_timestamp(string timestamp, string format)`  | timestamp                             | Converts a string to a timestamp according to the given format.             |
 | `to_char(timestamp t, string format)`            | string                                | Converts a timestamp to a string according to the given format.             |
 | `date_trunc(string unit, timestamp t)`           | timestamp                             | Truncates a timestamp to a specified precision based on the provided unit.  |
 | `regexp_like(string s, pattern p)`               | boolean                               | Evaluates if a string matches a regular expression pattern.                 |
-| `cardinality(array a)`                           | integer                               | Returns the number of elements in the array, or 0 if the array is empty.    |
-| `array_position(array a, typeof_array value)`    | integer                               | Returns the index of the first occurence of the value found in the array.   |
+| `cardinality(array a)`                           | integer                               | Returns the number of elements in the array.                                |
+| `array_position(array a, typeof_array value)`    | integer                               | Returns the index of the first occurrence of the value found in the array, or null if value is not found. |
 | `string_to_array(string s, string delimiter)`    | array of strings                      | Splits the given string into an array of strings using the given delimiter. |
-| `array_agg(expression e)`                        | array of input type                   | Create an array by concatenating the input values. Ordering is not deterministic |
-| `unnest(array a)`                                | type of array                         | Expands an array into a set of rows.                                        |
+| `array_agg(expression e)`                        | array of input type                   | Creates an array by collecting all the input values.                        |
+| `unnest(array a [, array b...])`                 | type of array                         | Expands arrays into a set of rows. This form is only allowed in a FROM clause. |
 
 {{% collapse-content title="Examples" level="h3" %}}
 
@@ -240,7 +240,7 @@ FROM
 ### `STRPOS`
 {{< code-block lang="sql" >}}
 SELECT
-  STRPOS('high', 'ig')
+  STRPOS('foobar', 'bar')
 {{< /code-block >}}
 
 ### `SPLIT_PART`
@@ -381,26 +381,24 @@ SELECT
 ### `ARRAY_AGG`
 {{< code-block lang="sql" >}}
 SELECT 
-  ARRAY_AGG(x) arr1, 
-  ARRAY_AGG(all x) arr2, 
-  ARRAY_AGG(distinct x) arr3, 
-  ARRAY_AGG(y) arr4
-FROM (
-    SELECT 1 x, 4.1 y
-    UNION ALL
-    SELECT 2 x, 5.1 y
-    UNION ALL
-    SELECT 2 x, 6.1 y
-);
+  sender,
+  ARRAY_AGG(subject) subjects, 
+  ARRAY_AGG(ALL subject) all_subjects, 
+  ARRAY_AGG(DISTINCT subject) distinct_subjects
+FROM 
+  emails
+GROUP BY 
+  sender
 {{< /code-block >}}
 
 ### `UNNEST`
 {{< code-block lang="sql" >}}
 SELECT 
-  *, 
-  UNNEST(recipients)
+  sender,
+  recipient 
 FROM 
-  emails;
+  emails,
+  UNNEST(recipients) AS recipient
 {{< /code-block >}}
 
 {{% /collapse-content %}}