Update star.md

Author: soerenwolfers

docs/stable/sql/expressions/star.md

@@ -134,37 +134,37 @@ SELECT COLUMNS(*) + COLUMNS(*) FROM numbers;
 ```sql
 SELECT *
 FROM (
-    SELECT 0 AS x, 0 AS y
+    SELECT 'a', 'a'
     UNION ALL
-    SELECT 0 AS x, 1 AS y
+    SELECT 'a', 'b'
     UNION ALL
-    SELECT 1 AS x, 1 AS y
-)
-WHERE COLUMNS(*) > 0; -- equivalent to: x > 0 AND y > 1
+    SELECT 'b', 'b'
+) _(x, y)
+WHERE COLUMNS(*) = 'a'; -- equivalent to: x = 'a' AND y = 'a'
 ```
 
 | x | y |
 |--:|--:|
-| 1 | 1 |
+| a | a |
 
-To combine using the logical `OR` operator, you can `UNPACK` the `COLUMNS` expression into the variadic `greatest` function.
+To combine conditions using the logical `OR` operator, you can `UNPACK` the `COLUMNS` expression into the variadic `greatest` function.
 
 ```sql
 SELECT *
 FROM (
-    SELECT 0 AS x, 0 AS y
+    SELECT 'a', 'a'
     UNION ALL
-    SELECT 0 AS x, 1 AS y
+    SELECT 'a', 'b'
     UNION ALL
-    SELECT 1 AS x, 1 AS y
-)
-WHERE greatest(UNPACK(COLUMNS(*) > 0)); -- equivalent to: x > 0 OR y > 1
+    SELECT 'b', 'b'
+) _(x, y)
+WHERE greatest(UNPACK(COLUMNS(*) = 'a')); -- equivalent to: x = 'a' OR y = 'a'
 ```
 
 | x | y |
 |--:|--:|
-| 0 | 1 |
-| 1 | 1 |
+| a | a |
+| a | b |
 
 ### Regular Expressions in a `COLUMNS` Expression