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[Improvement](docs) Update EN doc (#9228)

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Gabriel
2022-04-27 23:22:38 +08:00
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docs/en/sql-reference/sql-functions/window-function.md
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@ -101,7 +101,7 @@ This section introduces the methods that can be used as analysis functions in Do
### AVG()
grammar：
grammar:
```sql
AVG([DISTINCT | ALL] *expression*) [OVER (*analytic_clause*)]
@ -136,7 +136,7 @@ from int_t where property in ('odd','even');
### COUNT()
grammar：
grammar:
```sql
COUNT([DISTINCT | ALL] expression) [OVER (analytic_clause)]
@ -173,7 +173,7 @@ from int_t where property in ('odd','even');
The DENSE_RANK() function is used to indicate the ranking. Unlike RANK(), DENSE_RANK() does not have vacant numbers. For example, if there are two parallel ones, the third number of DENSE_RANK() is still 2, and the third number of RANK() is 3.
grammar：
grammar:
```sql
DENSE_RANK() OVER(partition_by_clause order_by_clause)
@ -202,7 +202,7 @@ The following example shows the ranking of the x column grouped by the property
FIRST_VALUE() returns the first value in the window range.
grammar：
grammar:
```sql
FIRST_VALUE(expr) OVER(partition_by_clause order_by_clause [window_clause])
@ -224,7 +224,7 @@ We have the following data
| Mats | Sweden | Tja |
```
Use FIRST_VALUE() to group by country and return the value of the first greeting in each group：
Use FIRST_VALUE() to group by country and return the value of the first greeting in each group:
```sql
select country, name,
@ -244,7 +244,7 @@ over (partition by country order by name, greeting) as greeting from mail_merge;
The LAG() method is used to calculate the value of several lines forward from the current line.
grammar：
grammar:
```sql
LAG (expr, offset, default) OVER (partition_by_clause order_by_clause)
@ -274,7 +274,7 @@ order by closing_date;
LAST_VALUE() returns the last value in the window range. Contrary to FIRST_VALUE().
grammar：
grammar:
```sql
LAST_VALUE(expr) OVER(partition_by_clause order_by_clause [window_clause])
@ -301,7 +301,7 @@ from mail_merge;
The LEAD() method is used to calculate the value of several rows from the current row.
grammar：
grammar:
```sql
LEAD (expr, offset, default]) OVER (partition_by_clause order_by_clause)
@ -334,7 +334,7 @@ order by closing_date;
### MAX()
grammar：
grammar:
```sql
MAX([DISTINCT | ALL] expression) [OVER (analytic_clause)]
@ -365,7 +365,7 @@ from int_t where property in ('prime','square');
### MIN()
grammar：
grammar:
```sql
MIN([DISTINCT | ALL] expression) [OVER (analytic_clause)]
@ -398,7 +398,7 @@ from int_t where property in ('prime','square');
The RANK() function is used to indicate ranking. Unlike DENSE_RANK(), RANK() will have vacant numbers. For example, if there are two parallel 1s, the third number in RANK() is 3, not 2.
grammar：
grammar:
```sql
RANK() OVER(partition_by_clause order_by_clause)
@ -427,7 +427,7 @@ select x, y, rank() over(partition by x order by y) as rank from int_t;
For each row of each Partition, an integer that starts from 1 and increases continuously is returned. Unlike RANK() and DENSE_RANK(), the value returned by ROW_NUMBER() will not be repeated or vacant, and is continuously increasing.
grammar：
grammar:
```sql
ROW_NUMBER() OVER(partition_by_clause order_by_clause)
@ -452,7 +452,7 @@ select x, y, row_number() over(partition by x order by y) as rank from int_t;
### SUM()
grammar：
grammar:
```sql
SUM([DISTINCT | ALL] expression) [OVER (analytic_clause)]