[SPARK-43219][SQL][DOCS] Add INSERT INTO REPLACE WHERE statement into website

docs/sql-ref-syntax-dml-insert-table.md

@@ -28,6 +28,8 @@ The `INSERT` statement inserts new rows into a table or overwrites the existing
 ```sql
 INSERT [ INTO | OVERWRITE ] [ TABLE ] table_identifier [ partition_spec ] [ ( column_list ) ]
     { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] | query }
+
+INSERT INTO [ TABLE ] table_identifier REPLACE WHERE boolean_expression query
 ```
 
 ### Parameters
@@ -58,6 +60,12 @@ INSERT [ INTO | OVERWRITE ] [ TABLE ] table_identifier [ partition_spec ] [ ( co
     Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted.
     A comma must be used to separate each value in the clause. More than one set of values can be specified to insert multiple rows.
 
+* **boolean_expression**
+
+  Specifies any expression that evaluates to a result type `boolean`. Two or
+  more expressions may be combined together using the logical
+  operators ( `AND`, `OR` ).
+
 * **query**
 
     A query that produces the rows to be inserted. It can be in one of following formats:
@@ -310,6 +318,39 @@ SELECT * FROM students;
 +-------------+--------------------------+----------+
 ```
 
+##### Insert Using a REPLACE WHERE Statement
+
+```sql
+-- Assuming the persons and persons2 table has already been created and populated.
+SELECT * FROM persons;
++-------------+--------------------------+---------+
+|         name|                   address|      ssn|
++-------------+--------------------------+---------+
+|Dora Williams|134 Forest Ave, Menlo Park|123456789|
++-------------+--------------------------+---------+
+|  Eddie Davis|   245 Market St, Milpitas|345678901|
++-------------+--------------------------+---------+
+
+SELECT * FROM persons2;
++-------------+--------------------------+---------+
+|         name|                   address|      ssn|
++-------------+--------------------------+---------+
+|   Ashua Hill|   456 Erica Ct, Cupertino|432795921|
++-------------+--------------------------+---------+
+
+-- in an atomic operation, 1) delete rows with ssn = 123456789 and 2) insert rows from persons2 
+INSERT INTO persons REPLACE WHERE ssn = 123456789 SELECT * FROM persons2
+
+SELECT * FROM persons;
++-------------+--------------------------+---------+
+|         name|                   address|      ssn|
++-------------+--------------------------+---------+
+|  Eddie Davis|   245 Market St, Milpitas|345678901|
++-------------+--------------------------+---------+
+|   Ashua Hill|   456 Erica Ct, Cupertino|432795921|
++-------------+--------------------------+---------+
+```
+
 ##### Insert Using a TABLE Statement
 
 ```sql