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fix queries

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This commit is contained in:
eaxdev 2021-02-23 17:14:22 +03:00 committed by Maksim Kita
parent be4d7d8636
commit 669f6d22bd
4 changed files with 62 additions and 62 deletions
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30
docs/en/getting-started/example-datasets/ontime.md
View File

@ -134,7 +134,7 @@ CREATE TABLE `ontime`
`Div5TailNum` String
) ENGINE = MergeTree
PARTITION BY Year
ORDER BY (FlightDate)
ORDER BY (IATA_CODE_Reporting_Airline, FlightDate)
SETTINGS index_granularity = 8192;
```
@ -207,7 +207,7 @@ LIMIT 10;
Q4. The number of delays by carrier for 2007
``` sql
SELECT Carrier, count(*)
SELECT IATA_CODE_Reporting_Airline AS Carrier, count(*)
FROM ontime
WHERE DepDelay>10 AND Year=2007
GROUP BY Carrier
@ -221,29 +221,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year=2007
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year=2007
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
Better version of the same query:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year=2007
GROUP BY Carrier
@ -257,29 +257,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year>=2000 AND Year<=2008
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
Better version of the same query:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
@ -298,7 +298,7 @@ FROM
from ontime
WHERE DepDelay>10
GROUP BY Year
)
) q
JOIN
(
select
@ -306,7 +306,7 @@ JOIN
count(*) as c2
from ontime
GROUP BY Year
) USING (Year)
) qq USING (Year)
ORDER BY Year;
```
@ -341,7 +341,7 @@ Q10.
``` sql
SELECT
min(Year), max(Year), Carrier, count(*) AS cnt,
min(Year), max(Year), IATA_CODE_Reporting_Airline AS Carrier, count(*) AS cnt,
sum(ArrDelayMinutes>30) AS flights_delayed,
round(sum(ArrDelayMinutes>30)/count(*),2) AS rate
FROM ontime

34
docs/ja/getting-started/example-datasets/ontime.md
View File

@ -142,7 +142,7 @@ CREATE TABLE `ontime`
`Div5TailNum` String
) ENGINE = MergeTree
PARTITION BY Year
ORDER BY (FlightDate)
ORDER BY (IATA_CODE_Reporting_Airline, FlightDate)
SETTINGS index_granularity = 8192;
```
@ -213,10 +213,10 @@ LIMIT 10;
Q4. 2007年のキャリア別の遅延の数
``` sql
SELECT Carrier, count(*)
SELECT IATA_CODE_Reporting_Airline AS Carrier, count(*)
FROM ontime
WHERE DepDelay>10 AND Year=2007
GROUP BY Carrier
GROUP BY IATA_CODE_Reporting_Airline
ORDER BY count(*) DESC;
```
@ -227,32 +227,32 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year=2007
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year=2007
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
同じクエリのより良いバージョン:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year=2007
GROUP BY Carrier
GROUP BY IATA_CODE_Reporting_Airline
ORDER BY c3 DESC
```
@ -263,29 +263,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year>=2000 AND Year<=2008
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
同じクエリのより良いバージョン:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
@ -304,7 +304,7 @@ FROM
from ontime
WHERE DepDelay>10
GROUP BY Year
)
) q
JOIN
(
select
@ -312,7 +312,7 @@ JOIN
count(*) as c2
from ontime
GROUP BY Year
) USING (Year)
) qq USING (Year)
ORDER BY Year;
```
@ -347,7 +347,7 @@ Q10.
``` sql
SELECT
min(Year), max(Year), Carrier, count(*) AS cnt,
min(Year), max(Year), IATA_CODE_Reporting_Airline AS Carrier, count(*) AS cnt,
sum(ArrDelayMinutes>30) AS flights_delayed,
round(sum(ArrDelayMinutes>30)/count(*),2) AS rate
FROM ontime

30
docs/ru/getting-started/example-datasets/ontime.md
View File

@ -140,7 +140,7 @@ CREATE TABLE `ontime`
`Div5TailNum` String
) ENGINE = MergeTree
PARTITION BY Year
ORDER BY (FlightDate)
ORDER BY (IATA_CODE_Reporting_Airline, FlightDate)
SETTINGS index_granularity = 8192;
```
@ -212,7 +212,7 @@ LIMIT 10;
Q4. Количество задержек по перевозчикам за 2007 год
``` sql
SELECT Carrier, count(*)
SELECT IATA_CODE_Reporting_Airline AS Carrier, count(*)
FROM ontime
WHERE DepDelay>10 AND Year=2007
GROUP BY Carrier
@ -226,29 +226,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year=2007
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year=2007
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
Более оптимальная версия того же запроса:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year=2007
GROUP BY Carrier
@ -262,29 +262,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year>=2000 AND Year<=2008
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
Более оптимальная версия того же запроса:
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
@ -303,7 +303,7 @@ FROM
from ontime
WHERE DepDelay>10
GROUP BY Year
)
) q
JOIN
(
select
@ -311,7 +311,7 @@ JOIN
count(*) as c2
from ontime
GROUP BY Year
) USING (Year)
) qq USING (Year)
ORDER BY Year;
```
@ -347,7 +347,7 @@ Q10.
``` sql
SELECT
min(Year), max(Year), Carrier, count(*) AS cnt,
min(Year), max(Year), IATA_CODE_Reporting_Airline AS Carrier, count(*) AS cnt,
sum(ArrDelayMinutes>30) AS flights_delayed,
round(sum(ArrDelayMinutes>30)/count(*),2) AS rate
FROM ontime

30
docs/zh/getting-started/example-datasets/ontime.md
View File

@ -142,7 +142,7 @@ CREATE TABLE `ontime`
`Div5TailNum` String
) ENGINE = MergeTree
PARTITION BY Year
ORDER BY (FlightDate)
ORDER BY (IATA_CODE_Reporting_Airline, FlightDate)
SETTINGS index_granularity = 8192;
```
@ -213,7 +213,7 @@ LIMIT 10;
Q4. 查询2007年各航空公司延误超过10分钟以上的次数
``` sql
SELECT Carrier, count(*)
SELECT IATA_CODE_Reporting_Airline AS Carrier, count(*)
FROM ontime
WHERE DepDelay>10 AND Year=2007
GROUP BY Carrier
@ -227,29 +227,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year=2007
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year=2007
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
更好的查询版本：
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year=2007
GROUP BY Carrier
@ -263,29 +263,29 @@ SELECT Carrier, c, c2, c*100/c2 as c3
FROM
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c
FROM ontime
WHERE DepDelay>10
AND Year>=2000 AND Year<=2008
GROUP BY Carrier
)
) q
JOIN
(
SELECT
Carrier,
IATA_CODE_Reporting_Airline AS Carrier,
count(*) AS c2
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
) USING Carrier
) qq USING Carrier
ORDER BY c3 DESC;
```
更好的查询版本：
``` sql
SELECT Carrier, avg(DepDelay>10)*100 AS c3
SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay>10)*100 AS c3
FROM ontime
WHERE Year>=2000 AND Year<=2008
GROUP BY Carrier
@ -304,7 +304,7 @@ FROM
from ontime
WHERE DepDelay>10
GROUP BY Year
)
) q
JOIN
(
select
@ -312,7 +312,7 @@ JOIN
count(*) as c2
from ontime
GROUP BY Year
) USING (Year)
) qq USING (Year)
ORDER BY Year;
```
@ -347,7 +347,7 @@ Q10.
``` sql
SELECT
min(Year), max(Year), Carrier, count(*) AS cnt,
min(Year), max(Year), IATA_CODE_Reporting_Airline AS Carrier, count(*) AS cnt,
sum(ArrDelayMinutes>30) AS flights_delayed,
round(sum(ArrDelayMinutes>30)/count(*),2) AS rate
FROM ontime