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Nov 15, 2025
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Update dashboard.md #2965

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8 changes: 4 additions & 4 deletions docs/en/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 @@ Before the analytics work, it is recommended to check for NULL and duplicate val
```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;
```

This SQL statement returns `41571`, indicating the number of rows that contain at least one NULL value.
Expand All @@ -58,7 +58,7 @@ This SQL statement returns `41571`, indicating the number of rows that contain a

```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. In the same worksheet, check for duplicate values in the table with the following SQL statement:

```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;
```

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