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morningman merged 1 commit into from
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[fix](sql-functions) provide setup data for window-function examples querying an undefined table #3874

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5 changes: 5 additions & 0 deletions docs/sql-manual/sql-functions/window-functions/lag.md
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Expand Up @@ -29,6 +29,11 @@ Returns the same data type as the input expression.

## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales amount and the previous day's sales amount:

```sql
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5 changes: 5 additions & 0 deletions docs/sql-manual/sql-functions/window-functions/lead.md
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Expand Up @@ -29,6 +29,11 @@ Returns the same data type as the input expression.

## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales and next day's sales:

```sql
Expand Down
5 changes: 5 additions & 0 deletions docs/sql-manual/sql-functions/window-functions/ntile.md
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Expand Up @@ -33,6 +33,11 @@ If a statement contains both an ORDER BY clause in the NTILE function and an ORD

## Examples

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
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5 changes: 5 additions & 0 deletions docs/sql-manual/sql-functions/window-functions/rank.md
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Expand Up @@ -22,6 +22,11 @@ Returns a BIGINT rank value. Returns the same rank for identical values, but cre

## Examples

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
Expand Down
5 changes: 5 additions & 0 deletions docs/sql-manual/sql-functions/window-functions/row-number.md
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Expand Up @@ -22,6 +22,11 @@ Returns a BIGINT sequence number, starting from 1 and incrementing continuously.

## Examples

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
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5 changes: 5 additions & 0 deletions ...us-plugin-content-docs/current/sql-manual/sql-functions/window-functions/lag.md
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Expand Up @@ -30,6 +30,11 @@ LAG ( <expr> [, <offset> [, <default> ] ] )

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与前一天销售额的差值：

```sql
Expand Down
5 changes: 5 additions & 0 deletions ...s-plugin-content-docs/current/sql-manual/sql-functions/window-functions/lead.md
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Expand Up @@ -30,6 +30,11 @@ LEAD ( <expr> [ , <offset> [ , <default> ] ] )

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与下一天销售额的差值：

```sql
Expand Down
5 changes: 5 additions & 0 deletions ...-plugin-content-docs/current/sql-manual/sql-functions/window-functions/ntile.md
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Expand Up @@ -35,6 +35,11 @@ NTILE( <constant_value> )

## 举例

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
Expand Down
5 changes: 5 additions & 0 deletions ...s-plugin-content-docs/current/sql-manual/sql-functions/window-functions/rank.md
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Expand Up @@ -24,6 +24,11 @@ RANK()

## 举例

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
Expand Down
5 changes: 5 additions & 0 deletions ...in-content-docs/current/sql-manual/sql-functions/window-functions/row-number.md
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Expand Up @@ -24,6 +24,11 @@ ROW_NUMBER()

## 举例

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
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5 changes: 5 additions & 0 deletions ...lugin-content-docs/version-2.1/sql-manual/sql-functions/window-functions/lag.md
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{
"title": "LAG",
"language": "zh-CN",
Expand All @@ -9,14 +9,14 @@
## 描述

LAG() 是一个窗口函数，用于访问当前行之前的行数据，而无需进行自连接。它可以获取分区内当前行之前第 N 行的值。

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Parameters section must be a Markdown table with Parameter and Description columns. Owner%3A @zclllyybb
## 语法

```sql
LAG ( <expr>, <offset>, <default> )
```

## 参数

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| 参数 | 说明 |
| ------------------- | ----------------------------------------------------------------- |
| expr | 需要获取值的表达式 |
Expand All @@ -29,6 +29,11 @@

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与前一天销售额的差值：

```sql
Expand Down
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{
"title": "LEAD",
"language": "zh-CN",
Expand All @@ -9,14 +9,14 @@
## 描述

LEAD() 是一个窗口函数，用于访问当前行之后的行数据，而无需进行自连接。它可以获取分区内当前行之后第 N 行的值。

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Parameters section must be a Markdown table with Parameter and Description columns. Owner%3A @zclllyybb
## 语法

```sql
LEAD ( <expr> [ , <offset> [ , <default> ] ] )
```

## 参数

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| 参数 | 说明 |
| ------------------- | ----------------------------------------------------------------------------------------------------------------- |
| expr | 需要获取值的表达式 |
Expand All @@ -29,6 +29,11 @@

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与下一天销售额的差值：

```sql
Expand Down
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{
"title": "NTILE",
"language": "zh-CN",
Expand All @@ -9,12 +9,12 @@
## 描述

NTILE() 是一个窗口函数，用于将有序数据集平均分配到指定数量的桶中。桶的编号从 1 开始顺序编号，直到指定的桶数。当数据无法平均分配时，优先将多出的记录分配给编号较小的桶，使得各个桶中的行数最多相差 1。

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## 语法

```sql
NTILE( <constant_value> )
```

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## 参数
| 参数 | 说明 |
Expand All @@ -33,6 +33,11 @@

## 举例

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
Expand Down
5 changes: 5 additions & 0 deletions ...ugin-content-docs/version-2.1/sql-manual/sql-functions/window-functions/rank.md
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{
"title": "RANK",
"language": "zh-CN",
Expand All @@ -22,6 +22,11 @@

## 举例

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
Expand Down
5 changes: 5 additions & 0 deletions ...ontent-docs/version-2.1/sql-manual/sql-functions/window-functions/row-number.md
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Expand Up @@ -22,6 +22,11 @@ ROW_NUMBER()

## 举例

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
Expand Down
5 changes: 5 additions & 0 deletions ...lugin-content-docs/version-3.x/sql-manual/sql-functions/window-functions/lag.md
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{
"title": "LAG",
"language": "zh-CN",
Expand Down Expand Up @@ -29,6 +29,11 @@

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与前一天销售额的差值：

```sql
Expand Down
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{
"title": "LEAD",
"language": "zh-CN",
Expand Down Expand Up @@ -29,6 +29,11 @@

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与下一天销售额的差值：

```sql
Expand Down
5 changes: 5 additions & 0 deletions ...gin-content-docs/version-3.x/sql-manual/sql-functions/window-functions/ntile.md
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Expand Up @@ -33,6 +33,11 @@ NTILE( <constant_value> )

## 举例

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
Expand Down
5 changes: 5 additions & 0 deletions ...ugin-content-docs/version-3.x/sql-manual/sql-functions/window-functions/rank.md
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Expand Up @@ -22,6 +22,11 @@ RANK()

## 举例

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
Expand Down
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Expand Up @@ -22,6 +22,11 @@ ROW_NUMBER()

## 举例

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
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"title": "LAG",
"language": "zh-CN",
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## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与前一天销售额的差值：

```sql
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Expand Up @@ -30,6 +30,11 @@ LEAD ( <expr> [ , <offset> [ , <default> ] ] )

## 举例

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

计算每个销售员当前销售额与下一天销售额的差值：

```sql
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Expand Up @@ -35,6 +35,11 @@ NTILE( <constant_value> )

## 举例

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
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Expand Up @@ -24,6 +24,11 @@ RANK()

## 举例

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
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Expand Up @@ -24,6 +24,11 @@ ROW_NUMBER()

## 举例

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
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---

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{
"title": "LAG",
"language": "en",
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## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales amount and the previous day's sales amount:

```sql
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Expand Up @@ -29,6 +29,11 @@ Returns the same data type as the input expression.

## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales and next day's sales:

```sql
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Expand Up @@ -33,6 +33,11 @@ If a statement contains both an ORDER BY clause in the NTILE function and an ORD

## Examples

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
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Expand Up @@ -22,6 +22,11 @@ Returns a BIGINT rank value. Returns the same rank for identical values, but cre

## Examples

<!-- setup-sql
CREATE TABLE employees (department VARCHAR(20), employee_name VARCHAR(20), salary INT) DISTRIBUTED BY HASH(employee_name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO employees VALUES ('Sales','Alice',10000),('Sales','Bob',10000),('Sales','Charlie',8000),('IT','David',12000),('IT','Eve',11000),('IT','Frank',11000),('IT','Grace',9000);
-->

```sql
SELECT
department,
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Expand Up @@ -22,6 +22,11 @@ Returns a BIGINT sequence number, starting from 1 and incrementing continuously.

## Examples

<!-- setup-sql
CREATE TABLE int_t (x INT, y INT) DISTRIBUTED BY HASH(x) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO int_t VALUES (1,1),(1,2),(1,2),(2,1),(2,2),(2,3),(3,1),(3,1),(3,2);
-->

```sql
select x, y, row_number() over(partition by x order by y) as rank from int_t;
```
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{
"title": "LAG",
"language": "en",
Expand Down Expand Up @@ -29,6 +29,11 @@

## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales amount and the previous day's sales amount:

```sql
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Expand Up @@ -29,6 +29,11 @@ Returns the same data type as the input expression.

## Examples

<!-- setup-sql
CREATE TABLE stock_ticker (stock_symbol VARCHAR(10), closing_date DATETIME, closing_price DOUBLE) DISTRIBUTED BY HASH(stock_symbol) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO stock_ticker VALUES ('JDR','2014-09-13 00:00:00',12.86),('JDR','2014-09-14 00:00:00',12.89),('JDR','2014-09-15 00:00:00',12.94),('JDR','2014-09-16 00:00:00',12.55),('JDR','2014-09-17 00:00:00',14.03),('JDR','2014-09-18 00:00:00',14.75),('JDR','2014-09-19 00:00:00',13.98);
-->

Calculate the difference between each salesperson's current sales and next day's sales:

```sql
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Expand Up @@ -33,6 +33,11 @@ If a statement contains both an ORDER BY clause in the NTILE function and an ORD

## Examples

<!-- setup-sql
CREATE TABLE student_scores (name VARCHAR(20), score INT) DISTRIBUTED BY HASH(name) BUCKETS 1 PROPERTIES("replication_num"="1");
INSERT INTO student_scores VALUES ('Alice',98),('Bob',95),('Charlie',90),('David',85),('Eve',82),('Frank',78),('Grace',75),('Henry',70);
-->

```sql
SELECT
name,
Expand Down
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