 Count number of LIKE-matches per Entry
By : Jithin Mavelipadam
Date : March 29 2020, 07:55 AM
Hope this helps In MySQL, boolean expressions can be used as integers -- with 0 for false and 1 for true. So, the following works: code :
SELECT p.*,
((name LIKE '%samsung%') + (name LIKE '%galaxy%') + (name LIKE '%s4%')) as hits
FROM myprods p
WHERE name LIKE '%samsung%' OR name LIKE '%galaxy%' OR name LIKE '%s4%';
SELECT p.*,
((name LIKE '%samsung%') + (name LIKE '%galaxy%') + (name LIKE '%s4%')) as hits
FROM myprods p
HAVING hits > 0;
|
 PostgreSQL: count number of occurrences of a value in a column using the last entry per day, per name
By : Aruns
Date : March 29 2020, 07:55 AM
Hope this helps SQL Fiddle code :
select
to_char(day, 'YYYY-MM-DD') as day,
measurement as value,
count(*) as count
from (
select distinct on (1, name)
date_trunc('day', time) as day, measurement
from t
order by 1, name, time desc
) s
group by 1, 2
order by 1, 2 desc
|
 how to count number of files with a specific entry?
By : Mark
Date : March 29 2020, 07:55 AM
seems to work fine In my script i am using the following... , Try this:
|
 How can I count the number of substring entry by using groupby
By : Rajiv
Date : March 29 2020, 07:55 AM
this one helps. I'm starting with input data like this , Extract the domains using regex and then use groupby().size() i.e code :
df['domains'] = df['email'].str.extract('@(.*?)\.',expand=False)
email country_code domains
0 12345kinglobito94@hotmail.com RU hotmail
1 12345arturdyikan6211@gmail.com RU gmail
2 12345leonardosebastianld.20@gmail.com PE gmail
3 12345k23156876vs@hotmail.com RU hotmail
4 12345jhuillcag@hotmail.com PE hotmail
5 12345ergasovaskazon72@gmail.com RU gmail
6 12345myrzadaevajrat@gmail.com RU gmail
7 12345filomena@hotmail.com BR hotmail
8 12345jppicotajose20@hotmail.com BR hotmail
df.groupby(["country_code","domains"]).size()
country_code domains
BR hotmail 2
PE gmail 1
hotmail 1
RU gmail 3
hotmail 2
dtype: int64
df.groupby(["country_code",df['email'].str.extract('@(.*?)\.',expand=False)]).size()
|
 How to get count of number of rows where one of the columns entry is the same
By : December Villanueva
Date : March 29 2020, 07:55 AM
may help you . You can use a GroupBy statement for this to group by a value of your items, and then Select the result you want from it: code :
var result = await db.Model
.GroupBy(x => x.Age)
.Select(g => new {
Age = g.Key,
Count = g.Count(),
})
.ToListAsync();
var result = await db.Model
.GroupBy(x => x.Age)
.Select(g => g.Count())
.ToListAsync();
|
code :
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