Assignment done

shuaiwo · Feb 12, 2024 · 8821fa8 · 8821fa8
1 parent 0ebb03c
commit 8821fa8
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Showing 8 changed files with 15 additions and 10 deletions.
diff --git a/.DS_Store b/.DS_Store
diff --git a/.env.template b/.env.template
@@ -3,6 +3,6 @@
 
 POSTGRES_HOST=localhost
 POSTGRES_PORT=5432
-POSTGRES_NAME=musa_509
+POSTGRES_NAME=musaw3
 POSTGRES_USER=postgres
 POSTGRES_PASS=postgres
diff --git a/assingment 1.pgsql b/assingment 1.pgsql
@@ -60,7 +60,7 @@ select *
 from indego.trips_2021_q3
 
 SELECT * FROM indego.trips_2021_q3 LIMIT 10;
-
+SELECT * FROM indego.station_statuses LIMIT 10;
 
 alter table indego.stations
 alter column go_live_date type date

diff --git a/query02.sql b/query02.sql
@@ -12,12 +12,17 @@
 -- Enter your SQL query here
 
 select
-    (100*((select count(*) from indego.trips_2022_q3) -
-    (select count(*) from indego.trips_2021_q3)) /
-    ((select count(*) from indego.trips_2021_q3))) 
+   round(
+    100 * (
+    (select count(*) from indego.trips_2022_q3) -
+    (select count(*) from indego.trips_2021_q3)
+    ) ::numeric /
+    (select count(*) from indego.trips_2021_q3), 2)
     ::text || '%' AS perc_change
 
 
+
+
 /*
     If you want to get fancier here, you can cast the result to a string and
     concatenate a '%' to the end. For example:

diff --git a/query03.sql b/query03.sql
@@ -7,5 +7,5 @@
 
 -- Enter your SQL query here
 
-SELECT ROUND(AVG(duration), 2)
+SELECT ROUND(AVG(duration), 2) as avg_duration
 FROM indego.trips_2021_q3;
diff --git a/query04.sql b/query04.sql
@@ -7,5 +7,5 @@
 
 -- Enter your SQL query here
 
-SELECT ROUND(AVG(duration), 2)
+SELECT ROUND(AVG(duration), 2) as avg_duration
 FROM indego.trips_2022_q3;
diff --git a/query05.sql b/query05.sql
@@ -6,6 +6,6 @@
 
 -- Enter your SQL query here
 
-SELECT MAX(duration) 
+SELECT MAX(duration) as max_duration
 FROM indego.trips_2021_q3 UNION SELECT MAX(duration) 
 FROM indego.trips_2022_q3;
diff --git a/query08.sql b/query08.sql
@@ -12,7 +12,7 @@
 SELECT
   start_station AS station_id,
   st_setsrid(
-    ST_MakePoint(start_lat, start_lon), 4326)::geography 
+    ST_MakePoint(start_lon, start_lat), 4326) 
     AS station_geog,
   COUNT(*) AS num_trips
 FROM
@@ -24,7 +24,7 @@ WHERE
   EXTRACT(HOUR FROM start_time) >= 7 AND
   EXTRACT(HOUR FROM start_time) < 10
 GROUP BY
-  station_id, station_geog
+  start_station, start_lon, start_lat
 ORDER BY
   num_trips DESC
 LIMIT 5;