Newbie on SQL and BigQuery in general. How to count the count of a column in BigQuery? As you can see from the code sample, the query returns the count of appName as WhitelistNames, but I would like to get a count of WhitelistNames.
SELECT
COUNT(appName) AS WhitelistNames,
bridgeToken
FROM (
SELECT
bridgeToken,
appName
FROM
[DB]
GROUP BY
bridgeToken,
appName )
GROUP BY
bridgeToken
ORDER BY
WhitelistNames DESC
Current query return is:
Row UniquebridgeToken WhitelistEntries
1 11111 5
2 22222 13
3 33333 3
4 44444 3
5 55555 3
But I would like to count the occurrence of UniquebridgeToken like below. Thanks in advance.:
Row WhitelistEntries BridgeCount
1 13 1
2 5 1
3 3 3
Below is for BigQuery Standard SQL and based on how I interpreted your question - which is:
for each bridgeToken how many unique appName's and how many total entries (rows) for that bridge
#standardSQL
SELECT
COUNT(DISTINCT appName) AS WhitelistNames,
COUNT(bridgeToken) AS BridgeCount
FROM `project.dataset.your_table`
GROUP BY bridgeToken
I understand that you want is to count how many UniquebridgeToken have the same number of WhitelistEntries. I think what you are looking for is that:
WITH nestedQuery AS (SELECT
appName,
COUNT(appName) as WhitelistEntries
FROM `project_name.dataset_name.table_name`
GROUP BY
price)
SELECT n.WhitelistEntries, COUNT(n.WhitelistEntries) as BridgeCount
FROM nestedQuery as n
GROUP BY n.WhitelistEntries
You can read about WITH clause here: https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax#with_clause
Related
I have two tables.University and UniversityType.Structure looks like this.
For University
universityId universityName universityTypeId universityTypeName
1 xyz 1 UGC
2 abc 1 UGC
3 lmn 2 NCT
4 pqr 3 AICT
For UniversityType
universityTypeId universityTypeName
1 UGC
2 NCT
3 AICT
The UniversityType table is fixed.Now I want to get the count of universityType that is UGC=2, AICT=1, NCT=1.Now I am writing something like this
SELECT universityId,universityTypeId,universityName FROM
University where universityTypeId=:universityTypeId";
But I am not getting correct result.Can anyone tell.I am new to SQL.
SELECT universityTypeId, COUNT(1)
FROM University where universityTypeId=:universityTypeId
OR
SELECT universityTypeId, COUNT(1)
FROM University
GROUP BY universityTypeId
OR
SELECT universityTypeId, (SELECT COUNT(1)
FROM University where universityTypeId = UniversityType.universityTypeId)
FROM UniversityType
Like this
SELECT universityId,universityName,count(universityTypeId) as total FROM
University group by universityId,universityName
You must add all columns list in the group by clause unless it used in the aggregate function
select universityTypeName, COUNT(University.universityId) FROM UniversityType JOIN University ON UniversityType.universityTypeId = University.universityTypeId GROUP BY UniversityType.universityTypeName
Try this query
You need to join the tables by UniversityType.universityTypeId and count the Universitys. So, try this:
SELECT t.universityTypeName, count(u.universityId) as total
FROM University u, UniversityType t
WHERE u.universityTypeId = t.universityTypeId
GROUP BY u.universityTypeName;
The output it gives is:
UGC|2
NCT|1
AICT|1
I want to write a query in SQL. Can someone help me for writing oracle sql query for below result table
Table 1 Data
prodno description
1 Laptop
2 Charger
3 Mouse
Table 2 Data
prodno prodset_no
1 1
2 1
3 1
1 2
3 2
1 3
2 3
Result Table
prodset_no prodset_desc
1 Laptop,Charger,Mouse
2 Laptop,Mouse
3 Laptop,Charger
JOIN the two table and then use listagg to produce comma separated output:
select t2.prodset_no,
listagg(t1.description, ',') within group (
order by t1.prodno
) prodset_desc
from table2 t2
join table1 t1 on t2.prodno = t1.prodno
group by t2.prodset_no;
Also, worth a note that the listagg has a limit of 4000 bytes. If you hit that limit, you can either use XMLAGG or rethink the problem and not do it in SQL at all but rather handle it in your application code.
I have the following query to count how many times each process_track_id occurs in a table:
SELECT
a.process_track_id,
COUNT(1) AS 'num'
FROM
transreport.process_name a
GROUP BY
a.process_track_id
This returns the following results:
process_track_id | num
1 14
2 44
3 16
5 8
6 18
7 17
8 14
This is great. Now is the part where I am stuck. I would like to get the following table:
num count
8 1
14 2
16 1
17 1
18 1
44 1
Where num are the distinct counts from the first table, and count is how many times that frequency occurs.
Here is what I have tried (it's a subquery, but I'm not sold on the method) and I haven't been able to get it to work just yet. I'm new to SQL and I think I'm missing out on some some key aspects of the syntax.
SELECT
X.id_count,
count(1) as 'num_count'
FROM
(SELECT
a.process_track_id,
COUNT(1) AS 'id_count'
FROM
transreport.process_name a
GROUP BY
a.process_track_id
--COUNT(1) AS 'id_count'
) X;
Any ideas?
It's probably good to keep in mind that this may have to be run on a database with at least 1 million records, and I don't have the ability to create a new table in the process.
Thanks!
Here's the subquery method you were driving at:
SELECT id_count, COUNT(*) AS 'num_count'
FROM (SELECT a.process_track_id
,COUNT(*) AS 'id_count'
FROM transreport.process_name a
GROUP BY a.process_track_id
)sub
GROUP BY id_count
Not sure there's a better method as the aggregation needs to run once anyway.
Try this
SELECT x.num, COUNT(*) AS COUNT
FROM (
SELECT
a.process_track_id, -- <--- You may removed this column
COUNT(*) AS 'num'
FROM
transreport.process_name a
GROUP BY
a.process_track_id
) X
GROUP BY X.num
How can I transform this table from this
id name
1 sam
2 nick
3 ali
4 farah
5 josef
6 fadi
to
id1 name1 id2 name2 id3 name3 id4 name4
1 sam 2 nick 3 ali 4 farah
5 josef 6 fadi
the reason i need this is i have a database and i need to do a mail merge using word and I want to print every 4 rows on one page, MS word can only print one row per page, so using an SQL query I want one row to represent 4 rows
thanks in advance
Ali
You don't need to create a query for this in Access. Word has a merge field called <<Next Record>> which forces moving to the next record. If you look at how label documents are created using the Mail Merge Wizard, you'll see that's how it's done.
Updated - Doing this in SQL
The columns in simple SELECT statements are derived from the columns from the underlying table/query (or from expressions). If you want to define columns based on the data, you need to use a crosstab query.
First create a query with a running count for each person (say your table is called People), and calculate the row and column position from the running count:
SELECT People.id, Count(*)-1 AS RunningCount, int(RunningCount/4) AS RowNumber, RunningCount Mod 4 AS ColumnNumber
FROM People
LEFT JOIN People AS People_1 ON People.id >= People_1.id
GROUP BY People.id;
(You won't be able to view this in the Query Designer, because the JOIN isn't comparing with = but with >=.)
This query returns the following results:
id Rank RowNumber ColumnNumber
1 0 0 0
2 1 0 1
3 2 0 2
4 3 0 3
5 4 1 0
6 5 1 1
Assuming this query is saved as Positions, the following query will return the results:
TRANSFORM First(Item) AS FirstOfItem
SELECT RowNumber
FROM (
SELECT ID AS Item, RowNumber, "id" &( ColumnNumber + 1) AS ColumnHeading
FROM Positions
UNION ALL SELECT Name, RowNumber, "name" & (ColumnNumber +1)
FROM Positions
INNER JOIN People ON Positions.id = People.id
) AS AllValues
GROUP BY AllValues.RowNumber
PIVOT AllValues.ColumnHeading In ("id1","name1","id2","name2","id3","name3","id4","name4");
The UNION is there so each record in the People table will have two columns - one with the id, and one with the name.
The PIVOT clause forces the columns to the specified order, and not in alphabetical order (e.g. id1, id2 ... name1, name2...)
I have a sql / sqlite question. I need to write a query that select some values from a sqlite database table. I always want the maximal returned records to be 20. If the total selected records are more than 20 I need to select 20 records that are spread evenly (no random) over the total records. It is also important that I always select the first and last value from the table when sorted on the date. These records should be inserted first and last in the result.
I know how to accomplish this in code but it would be perfect to have a sqlite query that can do the same.
The query Im using now is really simple and looks like this:
"SELECT value,date,valueid FROM tblvalue WHERE tblvalue.deleted=0 ORDER BY DATE(date)"
If I for example have these records in the talbe and to make an easier example the maximum result I want is 5.
id value date
1 10 2010-04-10
2 8 2010-04-11
3 8 2010-04-13
4 9 2010-04-15
5 10 2010-04-16
6 9 2010-04-17
7 8 2010-04-18
8 11 2010-04-19
9 9 2010-04-20
10 10 2010-04-24
The result I would like is spread evenly like this:
id value date
1 10 2010-04-10
3 8 2010-04-13
5 10 2010-04-16
7 8 2010-04-18
10 10 2010-04-24
Hope that explain what I want, thanks!
Something like this should work for you:
SELECT *
FROM (
SELECT v.value, v.date, v.valueid
FROM tblvalue v
LEFT OUTER JOIN (
SELECT min(DATE(date)) as MinDate, max(DATE(date)) as MaxDate
FROM tblvalue
WHERE tblvalue.deleted = 0
) vm on DATE(v.date) = vm.MinDate or DATE(v.date) = vm.MaxDate
WHERE tblvalue.deleted = 0
ORDER BY vm.MinDate desc, Random()
LIMIT 20
) a
ORDER BY DATE(date)
I think you want this:
SELECT value,date,valueid FROM tblvalue WHERE tblvalue.deleted=0
ORDER BY DATE(date), Random()
LIMIT 20
In other words you want select rows with date column, so that date is from the sorted list of dates, from where we take every odd element? And add the last recorded element (with the latest date)? And everything limited to max 20 rows?
If that's the case, then I think this one should do:
SELECT id,value,date FROM source_table WHERE date IN (SELECT date FROM source_table WHERE (rowid-1) % 2 = 0 OR date = (SELECT max(date) FROM source_table) ORDER BY date) LIMIT 20