Fix

docs/sql-ref-syntax-qry-select-distribute-by.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>DISTRIBUTE BY</code> clause is used to repartition the data based
 on the input expressions. Unlike the [CLUSTER BY](sql-ref-syntax-qry-select-clusterby.html)
 clause, this does not sort the data within each partition.

docs/sql-ref-syntax-qry-select-groupby.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>GROUP BY</code> clause is used to group the rows based on a set of specified grouping expressions and compute aggregations on
 the group of rows based on one or more specified aggregate functions. Spark also supports advanced aggregations to do multiple
 aggregations for the same input record set via `GROUPING SETS`, `CUBE`, `ROLLUP` clauses.

docs/sql-ref-syntax-qry-select-having.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>HAVING</code> clause is used to filter the results produced by
 <code>GROUP BY</code> based on the specified condition. It is often used
 in conjunction with a [GROUP BY](sql-ref-syntax-qry-select-groupby.html)

docs/sql-ref-syntax-qry-select-limit.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>LIMIT</code> clause is used to constrain the number of rows returned by
 the [SELECT](sql-ref-syntax-qry-select.html) statement. In general, this clause
 is used in conjunction with [ORDER BY](sql-ref-syntax-qry-select-orderby.html) to

docs/sql-ref-syntax-qry-select-orderby.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>ORDER BY</code> clause is used to return the result rows in a sorted manner
 in the user specified order. Unlike the [SORT BY](sql-ref-syntax-qry-select-sortby.html)
 clause, this clause guarantees a total order in the output.

docs/sql-ref-syntax-qry-select-setops.md

@@ -19,159 +19,176 @@ license: |
   limitations under the License.
 ---
 
+### Description
+
 Set operators are used to combine two input relations into a single one. Spark SQL supports three types of set operators:
-- `EXCEPT` or `MINUS`
-- `INTERSECT`
-- `UNION`
+
+ - `EXCEPT` or `MINUS`
+ - `INTERSECT`
+ - `UNION`
 
 Note that input relations must have the same number of columns and compatible data types for the respective columns.
 
 ### EXCEPT
+
 `EXCEPT` and `EXCEPT ALL` return the rows that are found in one relation but not the other. `EXCEPT` (alternatively, `EXCEPT DISTINCT`) takes only distinct rows while `EXCEPT ALL` does not remove duplicates from the result rows. Note that `MINUS` is an alias for `EXCEPT`.
 
 #### Syntax
+
 {% highlight sql %}
 [ ( ] relation [ ) ] EXCEPT | MINUS [ ALL | DISTINCT ] [ ( ] relation [ ) ]
 {% endhighlight %}
 
-### INTERSECT
-`INTERSECT` and `INTERSECT ALL` return the rows that are found in both relations. `INTERSECT` (alternatively, `INTERSECT DISTINCT`) takes only distinct rows while `INTERSECT ALL` does not remove duplicates from the result rows.
+#### Examples
 
-#### Syntax
 {% highlight sql %}
-[ ( ] relation [ ) ] INTERSECT [ ALL | DISTINCT ] [ ( ] relation [ ) ]
-{% endhighlight %}
-
-### UNION
-`UNION` and `UNION ALL` return the rows that are found in either relation. `UNION` (alternatively, `UNION DISTINCT`) takes only distinct rows while `UNION ALL` does not remove duplicates from the result rows.
-
-#### Syntax
-{% highlight sql %}
-[ ( ] relation [ ) ] UNION [ ALL | DISTINCT ] [ ( ] relation [ ) ]
-{% endhighlight %}
-
-### Examples
-{% highlight sql %}
--- Use number1 and number2 tables to demonstrate set operators.
+-- Use number1 and number2 tables to demonstrate set operators in this page.
 SELECT * FROM number1;
-+---+
-|  c|
-+---+
-|  3|
-|  1|
-|  2|
-|  2|
-|  3|
-|  4|
-+---+
-
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  1|
+  |  2|
+  |  2|
+  |  3|
+  |  4|
+  +---+
+  
 SELECT * FROM number2;
-+---+
-|  c|
-+---+
-|  5|
-|  1|
-|  2|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  5|
+  |  1|
+  |  2|
+  |  2|
+  +---+
 
 SELECT c FROM number1 EXCEPT SELECT c FROM number2;
-+---+
-|  c|
-+---+
-|  3|
-|  4|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  4|
+  +---+
 
 SELECT c FROM number1 MINUS SELECT c FROM number2;
-+---+
-|  c|
-+---+
-|  3|
-|  4|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  4|
+  +---+
 
 SELECT c FROM number1 EXCEPT ALL (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  3|
-|  3|
-|  4|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  3|
+  |  4|
+  +---+
 
 SELECT c FROM number1 MINUS ALL (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  3|
-|  3|
-|  4|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  3|
+  |  4|
+  +---+
+{% endhighlight %}
 
+### INTERSECT
+
+`INTERSECT` and `INTERSECT ALL` return the rows that are found in both relations. `INTERSECT` (alternatively, `INTERSECT DISTINCT`) takes only distinct rows while `INTERSECT ALL` does not remove duplicates from the result rows.
+
+#### Syntax
+
+{% highlight sql %}
+[ ( ] relation [ ) ] INTERSECT [ ALL | DISTINCT ] [ ( ] relation [ ) ]
+{% endhighlight %}
+
+#### Examples
+
+{% highlight sql %}
 (SELECT c FROM number1) INTERSECT (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  1|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  1|
+  |  2|
+  +---+
 
 (SELECT c FROM number1) INTERSECT DISTINCT (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  1|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  1|
+  |  2|
+  +---+
 
 (SELECT c FROM number1) INTERSECT ALL (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  1|
-|  2|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  1|
+  |  2|
+  |  2|
+  +---+
+{% endhighlight %}
+
+### UNION
 
+`UNION` and `UNION ALL` return the rows that are found in either relation. `UNION` (alternatively, `UNION DISTINCT`) takes only distinct rows while `UNION ALL` does not remove duplicates from the result rows.
+
+#### Syntax
+
+{% highlight sql %}
+[ ( ] relation [ ) ] UNION [ ALL | DISTINCT ] [ ( ] relation [ ) ]
+{% endhighlight %}
+
+### Examples
+
+{% highlight sql %}
 (SELECT c FROM number1) UNION (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  1|
-|  3|
-|  5|
-|  4|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  1|
+  |  3|
+  |  5|
+  |  4|
+  |  2|
+  +---+
 
 (SELECT c FROM number1) UNION DISTINCT (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  1|
-|  3|
-|  5|
-|  4|
-|  2|
-+---+
+  +---+
+  |  c|
+  +---+
+  |  1|
+  |  3|
+  |  5|
+  |  4|
+  |  2|
+  +---+
 
 SELECT c FROM number1 UNION ALL (SELECT c FROM number2);
-+---+
-|  c|
-+---+
-|  3|
-|  1|
-|  2|
-|  2|
-|  3|
-|  4|
-|  5|
-|  1|
-|  2|
-|  2|
-+---+
-
+  +---+
+  |  c|
+  +---+
+  |  3|
+  |  1|
+  |  2|
+  |  2|
+  |  3|
+  |  4|
+  |  5|
+  |  1|
+  |  2|
+  |  2|
+  +---+
 {% endhighlight %}
 
 ### Related Statements

docs/sql-ref-syntax-qry-select-sortby.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>SORT BY</code> clause is used to return the result rows sorted
 within each partition in the user specified order. When there is more than one partition
 <code>SORT BY</code> may return result that is partially ordered. This is different

docs/sql-ref-syntax-qry-select-where.md

@@ -18,6 +18,9 @@ license: |
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
+
+### Description
+
 The <code>WHERE</code> clause is used to limit the results of the <code>FROM</code>
 clause of a query or a subquery based on the specified condition.