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Převod na formát kodim 2.0 #8

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Aug 25, 2023
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Převod na formát kodim 2.0 #8

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2 changes: 1 addition & 1 deletion entry.yml
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title: Datová analytika
lead: Kurz SQL - Digitální akademie data. Lekce SQL nad Snowflake/Keboola.
image: intro-image.svg
image: assets/intro-image.svg
chapters:
- sql
18 changes: 9 additions & 9 deletions sql/vyuka/cviceni-01.md
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Expand Up @@ -29,12 +29,12 @@ V úkolech budeme pracovat s tabulkou `TEROR` ve schématu `SCH_TEROR`.
INT_MISC, INT_ANY, RELATED
```

::exc[cviceni>01-01-vyber-vse]
::exc[cviceni>01-02-deset-radku]
::exc[cviceni>01-03-tri-sloupce]
::exc[cviceni>01-04-unikatni-roky]
::exc[cviceni>01-05-2016]
::exc[cviceni>01-06]
::exc[cviceni>01-07]
::exc[cviceni>01-08]
::exc[cviceni>01-09]
::exc[cviceni/01-01-vyber-vse]
::exc[cviceni/01-02-deset-radku]
::exc[cviceni/01-03-tri-sloupce]
::exc[cviceni/01-04-unikatni-roky]
::exc[cviceni/01-05-2016]
::exc[cviceni/01-06]
::exc[cviceni/01-07]
::exc[cviceni/01-08]
::exc[cviceni/01-09]
24 changes: 12 additions & 12 deletions sql/vyuka/cviceni-02.md
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Expand Up @@ -2,15 +2,15 @@

V úkolech budeme pracovat s tabulkou `TEROR` ve schématu `SCH_TEROR`.

::exc[cviceni>02-01]
::exc[cviceni>02-02]
::exc[cviceni>02-03]
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::exc[cviceni>02-12]
::exc[cviceni/02-01]
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14 changes: 7 additions & 7 deletions sql/vyuka/cviceni-03.md
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Expand Up @@ -2,10 +2,10 @@

V úkolech budeme pracovat s tabulkou `TEROR` ve schématu `SCH_TEROR`.

::exc[cviceni>03-01]
::exc[cviceni>03-02]
::exc[cviceni>03-03]
::exc[cviceni>03-04]
::exc[cviceni>03-05]
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::exc[cviceni>03-07]
::exc[cviceni/03-01]
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::exc[cviceni/03-03]
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12 changes: 6 additions & 6 deletions sql/vyuka/cviceni-04.md
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Expand Up @@ -2,9 +2,9 @@

V úkolech budeme pracovat

::exc[cviceni>04-01]
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10 changes: 5 additions & 5 deletions sql/vyuka/cviceni-05.md
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Expand Up @@ -21,8 +21,8 @@ Pokud nevíte, jak naimportovat data, nebo jste se na tom zasekli, tak [tady je

**Nedoporučujeme** se na to vykašlat a jet rovnou podle návodu, z toho si odnesete velmi málo. 😉

::exc[cviceni>05-01]
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6 changes: 3 additions & 3 deletions sql/vyuka/cviceni-06.md
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Expand Up @@ -2,6 +2,6 @@

Vnořené dotazy a CTE

::exc[cviceni>06-01]
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6 changes: 3 additions & 3 deletions sql/vyuka/cviceni-07.md
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Expand Up @@ -2,6 +2,6 @@

Vnořené dotazy a CTE

::exc[cviceni>07-01]
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4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-01-vyber-vse.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vyber vše z tabulky teror.

---solution
:::solution

- Všechny řádky vybereme tím, že nezadáme žádnou podmínku. Abychom vybrali všechny sloupce, můžeme použít hvězdičku.

Expand Down Expand Up @@ -81,3 +81,5 @@ Vyber vše z tabulky teror.
FROM TEROR
WHERE 1 = 1;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-02-deset-radku.md
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Expand Up @@ -5,9 +5,11 @@ demand: 2

Zobraz (náhodných) deset řádků z tabulky teror.

---solution
:::solution

```sql
SELECT * FROM teror
LIMIT 10;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-03-tri-sloupce.md
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Expand Up @@ -4,7 +4,7 @@ demand: 1
---

Vypiš jen sloupce EVENTID, IYEAR, COUNTRY_TXT, REGION_TXT.
---solution
:::solution

- Abychom vybrali jen čtyři sloupce, musíme je vyjmenovat

Expand Down Expand Up @@ -46,3 +46,5 @@ Vypiš jen sloupce EVENTID, IYEAR, COUNTRY_TXT, REGION_TXT.

FROM TEROR;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-04-unikatni-roky.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vypiš všechny roky vyskytující se v tabulce teror, tak aby byl každý rok ve výsledné tabulce jen jednou.

---solution
:::solution

Abychom vybrali pouze jeden sloupec, napíšeme jeho jméno:

Expand All @@ -23,3 +23,5 @@ Anebo je všechny _zgroupovat_ podle IYEAR:
```

Tato varianta bude fungovat, ale je zbytečně složitá a pokud se nedotazujete na nic složitějšího, tak nedoporučujeme. 😉

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-05-2016.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vyber všechny teroristické útoky v roce 2016.

---solution
:::solution

Abychom vybrali všechny teroristické útoky v roce 2016, musíme použít filtr na sloupec IYEAR:

Expand All @@ -20,3 +20,5 @@ nebo funkci DATE_PART nad sloupcem IDATE
SELECT * FROM TEROR
WHERE DATE_PART(YEAR, IDATE) = 2016;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-06.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vypiš všechny útoky za rok 2015 a vyber pouze sloupce EVENTID, IYEAR, COUNTRY_TXT, REGION_TXT a přejmenuj je na UDALOST, ROK, ZEME, REGION.

---solution
:::solution

```sql
SELECT EVENTID AS UDALOST,
Expand All @@ -15,3 +15,5 @@ Vypiš všechny útoky za rok 2015 a vyber pouze sloupce EVENTID, IYEAR, COUNTRY
FROM TEROR
WHERE IYEAR=2015;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-07.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vyber všechny události v roce 2014 a vyber pouze sloupce IYEAR, IMONTH A IDAY. Spoj je do jednoho sloupce oddělené pomlčkou a pojmenuj ho DATUM.

---solution
:::solution

- Sloupečky můžeme spojit spojovátkem `||`:

Expand All @@ -22,3 +22,5 @@ Vyber všechny události v roce 2014 a vyber pouze sloupce IYEAR, IMONTH A IDAY.
FROM TEROR
WHERE IYEAR=2014;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-08.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Seřaď datum z předchozího selektu sestupně (desc) a vypiš jen jedinečné záznamy.

---solution
:::solution

Sloupečky můžeme spojit spojovátkem `||`:

Expand All @@ -24,3 +24,5 @@ Sloupečky můžeme spojit funkcí `CONCAT`:
WHERE IYEAR=2014
ORDER BY DATUM DESC;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/01-09.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vypiš počet teroristických útoků, které se staly po roce 2015 (52243).

---solution
:::solution

a)

Expand All @@ -24,3 +24,5 @@ b)
WHERE DATE_PART(YEAR, IDATE) > 2015;
-- 52243
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-01.md
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Expand Up @@ -5,11 +5,13 @@ demand: 1

Vyber z tabulky `TEROR` útoky v Německu, kde zemřel alespoň jeden terorista.

---solution
:::solution

```sql
SELECT *
FROM TEROR
WHERE NKILLTER > 0
AND COUNTRY_TXT = 'Germany';
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-02.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Zobraz jen sloupečky GNAME, COUNTRY_TXT, NKILL a všechny řádky (seřazené podle počtu mrtvých sestupně), na kterých je víc než 340 mrtvých (počet mrtvých je ve sloupci NKILL), sloupečky přejmenuj na ORGANIZACE, ZEME, POCET_MRTVYCH.

---solution
:::solution

```sql
SELECT
Expand All @@ -16,3 +16,5 @@ FROM teror
WHERE nkill > 340
ORDER BY POCET_MRTVYCH DESC;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-03.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Zobraz sloupečky IYEAR, IMONTH, IDAY, GNAME, CITY, ATTACKTYPE1_TXT, TARGTYPE1_TXT, WEAPTYPE1_TXT, WEAPDETAIL, NKILL, NWOUND a vyber jen útoky, které se staly v Czech Republic v letech 2015, 2016 a 2017. Všechna data seřaď chronologicky sestupně.

---solution
:::solution

```sql
SELECT IYEAR,
Expand All @@ -26,3 +26,5 @@ ORDER BY IYEAR DESC,
IMONTH DESC,
IDAY DESC;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-04.md
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Expand Up @@ -5,11 +5,13 @@ demand: 1

Vypiš všechny organizace, které na jakémkoliv místě v názvu obsahují výraz „anti“ a výraz „extremists“.

---solution
:::solution

```sql
SELECT DISTINCT GNAME
FROM TEROR
WHERE GNAME ILIKE '%anti%'
AND GNAME ilike '%extremists%';
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-05.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Z IYEAR, IMONTH a IDAY vytvořte sloupeček datum a vypište tohle datum a pak datum o tři měsíce později a klidně i o tři dny a tři měsíce.

---solution
:::solution

```sql
SELECT DATE_FROM_PARTS(IYEAR, IMONTH, IDAY) DATUM,
Expand All @@ -20,3 +20,5 @@ SELECT DATE_FROM_PARTS(IYEAR, IMONTH, IDAY) DATUM,
) O_TRI_MESICE_A_TRI_DNY_POZDEJI
FROM TEROR;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-06.md
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Expand Up @@ -5,9 +5,11 @@ demand: 1

Vypiš všechny druhy útoků ATTACKTYPE1_TXT.

---solution
:::solution

```sql
SELECT DISTINCT ATTACKTYPE1_TXT
FROM TEROR;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-07.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vypiš všechny útoky v Německu v roce 2015, vypiš sloupečky IYEAR, IMONTH, IDAY, COUNTRY_TXT, REGION_TXT, PROVSTATE, CITY, NKILL, NKILLTER, NWOUND. Ve sloupečku COUNTRY_TXT bude všude hodnota ‘Německo’

---solution
:::solution

```sql
SELECT IYEAR AS ROK,
Expand All @@ -23,3 +23,5 @@ FROM TEROR
WHERE COUNTRY_TXT = 'Germany'
AND IYEAR = 2015;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-08.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Kolik událostí se stalo ve třetím a čtvrtém měsíci a počet mrtvých teroristů není NULL?

---solution
:::solution

```sql
SELECT COUNT(*)
Expand All @@ -31,3 +31,5 @@ WHERE (
)
AND NKILLTER IS NOT NULL;
```

:::
4 changes: 3 additions & 1 deletion sql/vyuka/cviceni/02-09.md
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Expand Up @@ -5,7 +5,7 @@ demand: 1

Vypiš první 3 města seřazena abecedně, kde bylo zabito 30 až 100 teroristů nebo zabito 500 až 1000 lidí. Vypiš i sloupečky nkillter a nkill.

---solution
:::solution

```sql
SELECT
Expand Down Expand Up @@ -36,3 +36,5 @@ WHERE (
ORDER BY CITY
LIMIT 3;
```

:::
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