update functions and expressions

docs-2.0/3.ngql-guide/6.functions-and-expressions/1.math.md

@@ -52,7 +52,7 @@ double radians() | Converts degrees to radians. `radians(180)` returns `3.141592
 ## Example
 
 ```ngql
-# The following clause supports aggregate functions.
+# The following statement supports aggregate functions.
 nebula>  GO FROM "Tim Duncan" OVER like YIELD like._dst AS dst, $$.player.age AS age \
          | GROUP BY $-.dst \
          YIELD \

docs-2.0/3.ngql-guide/6.functions-and-expressions/12.hash.md

@@ -2,8 +2,7 @@
 
 The `hash()` function returns the hash value of the argument. The argument can be a number, a string, a list, a boolean, null, or an expression that evaluates to a value of the preceding data types.
 
-The source code of the `hash()` function (MurmurHash2), seed (`0xc70f6907UL`), and other parameters can be found in [`MurmurHahs2.h`](https://github.com/vesoft-inc/nebula-common/blob/master/src/common/base/MurmurHash2.h).
-
+The source code of the `hash()` function (MurmurHash2), seed (`0xc70f6907UL`), and other parameters can be found in [`MurmurHash2.h`](https://github.com/vesoft-inc/nebula/blob/master/src/common/base/MurmurHash2.h).
 
 For Java, the hash function operates as follows.
 

docs-2.0/3.ngql-guide/6.functions-and-expressions/3.date-and-time.md

@@ -21,10 +21,10 @@ The `date()`, `time()`, and `datetime()` functions accept three kind of paramete
 ## Examples
 
 ```ngql
-> RETURN now(), timestamp(), date(), time(), datetime(), timestamp();
+> RETURN now(), timestamp(), date(), time(), datetime();
 +------------+-------------+------------+-----------------+----------------------------+
 | now()      | timestamp() | date()     | time()          | datetime()                 |
 +------------+-------------+------------+-----------------+----------------------------+
 | 1625470028 | 1625470028  | 2021-07-05 | 07:27:07.944000 | 2021-07-05T07:27:07.944000 |
 +------------+-------------+------------+-----------------+----------------------------+
-```
+```

docs-2.0/3.ngql-guide/6.functions-and-expressions/6.list.md

@@ -55,7 +55,7 @@ nebula> MATCH p = (a:player)-[]->(b)-[]->(c:team) \
 | [("player100" :player{age: 42, name: "Tim Duncan"}), ("player125" :player{age: 41, name: "Manu Ginobili"}), ("team204" :team{name: "Spurs"})] |
 +-----------------------------------------------------------------------------------------------------------------------------------------------+
 
-nebula> MATCH p = (a:player)-[]->(b)-[]->(c:team) WHERE a.name == "Tim Duncan" AND c.name == "Spurs" RETURN relationships(p)
+nebula> MATCH p = (a:player)-[]->(b)-[]->(c:team) WHERE a.name == "Tim Duncan" AND c.name == "Spurs" RETURN relationships(p);
 +-----------------------------------------------------------------------------------------------------------------------------+
 | relationships(p)                                                                                                            |
 +-----------------------------------------------------------------------------------------------------------------------------+

docs-2.0/3.ngql-guide/6.functions-and-expressions/7.count.md

@@ -66,7 +66,7 @@ nebula> LOOKUP ON player \
         YIELD player.age As playerage \
         | GROUP BY $-.playerage \
         YIELD $-.playerage as age, count(*) AS number \
-        | ORDER BY number DESC, age DESC;
+        | ORDER BY $-.number DESC, $-.age DESC;
 +-----+--------+
 | age | number |
 +-----+--------+