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Update dashboard.md #2964

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10 changes: 5 additions & 5 deletions docs/cn/tutorials/databend-cloud/dashboard.md
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ import StepContent from '@site/src/components/Steps/step-content';
```sql
SELECT COUNT(*)
FROM covid_19_us_2022_3812
WHERE date IS NULL OR country IS NULL OR state IS NULL OR flip IS NULL OR cases IS NULL OR deaths IS NULL;
WHERE date IS NULL OR country IS NULL OR state IS NULL OR fips IS NULL OR cases IS NULL OR deaths IS NULL;
```

此 SQL 语句返回 `41571`，表示包含至少一个 NULL 值的行数。
Expand All @@ -58,7 +58,7 @@ WHERE date IS NULL OR country IS NULL OR state IS NULL OR flip IS NULL OR cases

```sql
DELETE FROM covid_19_us_2022_3812
WHERE date IS NULL OR country IS NULL OR state IS NULL OR flip IS NULL OR cases IS NULL OR deaths IS NULL;
WHERE date IS NULL OR country IS NULL OR state IS NULL OR fips IS NULL OR cases IS NULL OR deaths IS NULL;
```

</StepContent>
Expand All @@ -71,9 +71,9 @@ WHERE date IS NULL OR country IS NULL OR state IS NULL OR flip IS NULL OR cases
1. 在同一个工作表中，使用以下 SQL 语句检查表中是否存在重复值：

```sql
SELECT date, country, state, flip, cases, deaths, COUNT(*)
SELECT date, country, state, fips, cases, deaths, COUNT(*)
FROM covid_19_us_2022_3812
GROUP BY date, country, state, flip, cases, deaths
GROUP BY date, country, state, fips, cases, deaths
HAVING COUNT(*) > 1;
```

Expand Down Expand Up @@ -184,4 +184,4 @@ WHERE

2. 将左侧的图表拖放到仪表盘上。您可以根据需要调整图表的大小或重新定位。

![Alt text](@site/static/public/img/cloud/dashboard-7.gif)
![Alt text](@site/static/public/img/cloud/dashboard-7.gif)
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