logo
Tags down

shadow

Insert zero values for unexisting groups in Redshift


By : Gui Wege
Date : October 18 2020, 08:10 PM
will be helpful for those in need Use a cross join to generate the rows and then a left join to bring in the data:
code :
SELECT EXTRACT(year FROM created_at) AS year,
       EXTRACT(month FROM created_at) AS month,
       m.member_id,
       COUNT(t.member_id) as pageviews
FROM (SELECT DISTINCT EXTRACT(year FROM created_at) AS year, EXTRACT(month FROM created_at) AS month FROM TABLE) ym CROSS JOIN
     (SELECT DISTINCT member_id FROM TABLE) m LEFT JOIN
     TABLE t
     ON EXTRACT(year FROM created_at) AS month = ym.year AND
        EXTRACT(month FROM created_at) AS month = ym.month AND
        t.member_id = m.member_id
GROUP BY ym.year, ym.month, m.member_id
ORDER BY ym.year, ym.month, m.member_id;


Share : facebook icon twitter icon

Select unexisting values


By : karateboy
Date : March 29 2020, 07:55 AM
I wish this help you You can use a LEFT JOIN with a GROUP BY to do one query against the database and get the complete result;
code :
SELECT Tag, COUNT(ImgId) selected
FROM TAGS 
LEFT JOIN TAGGED
  ON tags.TagId = TAGGED.TagId
 AND TAGGED.ImgId = 5
GROUP BY Tag;

Table insert unexisting values


By : user3924120
Date : March 29 2020, 07:55 AM
To fix the issue you can do Current situation tblGamePoints , Using a not exists condition seems easier to me:
code :
INSERT INTO tblGamePoints (Gamenumber, PlayerId, Game, Points) 
SELECT      3, tblPlayer.Id, 'FPS', 0 
FROM        tblPlayer 
WHERE       Game = 'FPS' AND 
            ValidatedEntry='1' AND 
            NOT EXISTS (SELECT *
                        FROM   tblGamePoints
                        WHERE  PlayerId = tblPlayer.Id AND Game = 3)

How to insert NULL values from Spark into Redshift?


By : Zade Zaman
Date : March 29 2020, 07:55 AM
like below fixes the issue You can specify the value in your COPY statement with NULL AS 'NULL' http://docs.aws.amazon.com/redshift/latest/dg/copy-parameters-data-conversion.html#copy-null-as
I would suggest trying out the spark-reshift library for loading Redshift. It takes care of a lot of these issues for you. https://github.com/databricks/spark-redshift

Calc aggregates across continuous groups of values in Redshift


By : user3725918
Date : March 29 2020, 07:55 AM
Does that help This is a so-called gaps-and-islands approach. Written on my phone so untested. But you should be able to search SO for that key-phrase.
code :
WITH
  sorted AS
(
  SELECT
    *, 
    ROW_NUMBER()
      OVER (
        PARTITION BY userid
            ORDER BY start
      )
        AS row_userid_start,
    ROW_NUMBER()
      OVER (
        PARTITION BY userid, status
            ORDER BY start
      )
        AS row_userid_status_start
  FROM
    #t
)
SELECT
  userid,
  status,
  MIN(start)   AS start,
  MAX(end)     AS end
FROM
  sorted
GROUP BY
  userid,
  status,
  row_userid_status_start - row_userid_start

Redshift insert values into table


By : alista24ftp
Date : March 29 2020, 07:55 AM
With these it helps I'm not familiar with pg8000 so take this with a grain of salt.
The final query you want to run should end up looking like:
Related Posts Related Posts :
  • Count distinct values in an SQL table for each hour in a day
  • If else in Where Clause SQL
  • Select multiple rows with matching id(s)
  • Oracle SQL query for Group By with Having clause
  • sql list of records within a path scope
  • Condition for MAX(Booking) within a specific period
  • Unable to query multiple tables via XML: Error occurred in XML processing
  • SQL first date for the first occurrence of a value
  • Update multiple columns Table from a select statement
  • Is it possible to find (in an ordered table) multiple rows in sequence?
  • Query to return month-wise count in PostgreSQL
  • adding years getting invalid number error in case statement only - ORA-01722
  • Insert into a table using multiple tables
  • How to create a SQL Server Pivot Table
  • My SQL - COUNT field on multitable group by other field
  • How to order by a different column and then fetch offset rows in SQL Server?
  • Query builder Eloquent using Eager Loading in Laravel
  • What is the complexity of the CUBE operator in SQL?
  • IIF statement MS ACCESS VBA SQL
  • SQL Server group by?
  • LIKE in Elasticsearch for large texts
  • SQL - dynamic sum based on dynamic date range
  • SQL Order By: Specific Value First, then Ordering?
  • SQL Developer - SELECT statement with AVG calculation displaying multiple averages?
  • Microsoft SQL Server : return only the rows with the most recent date for each unique ID
  • How to create a queue like structure in SQL Server
  • Cross apply on columns on SQL server. Syntax error near )
  • Select count of subquery results, along with another field
  • SQL Server 2016 - Five Column to single row
  • SQL LIKE '%...' in vba HTTP request
  • SQL Developer - How do I get MAX & AVG to draw from one column and filter from themselves?
  • How to optimize SQL query with multiple selects
  • Postgresql 11 - Create Procedure to Execute COPY function
  • Oracle VIEW - Convert VARCHAR2 to DATE and find MIN/MAX of DATE
  • In SQL, Main table should match with lookup table for the multiple columns
  • Very slow performance for inner join with restrictive where clause (very small subset of rows)
  • oracle sql 2 columns in one column
  • SQL query to get conflicting values in JSONB from a group
  • Two queries with same tables and join logic but different results
  • How to update a table joined with another table multiple times in Oracle?
  • Crystal Report how can I get data for every 5th of months
  • Finding MAX() from a serial number field which contains characters in SQL Server
  • Getting all distinct values and sorting them by hour
  • Database Compatibility Level
  • Combine WITH statement with UNION
  • Self Nested SQL join
  • My store procedure only executes my first select statement while I wrote three?
  • Inserting Date gives error ORA-01861: literal does not match format string
  • Need to join row data into columns in Oracle
  • Syntax error Missing operator in my case statement
  • Filter the values from the source in merge query in mssql
  • How can i replace/convert number to string
  • Updating a table, on a button press, with selected information
  • Oracle SQL report generation without null
  • SQL get the names of the columns that are stored in a different table
  • Number masking & nls_parameter
  • Delete duplicate roles for SQL server
  • SQL Server: How to change collation of all columns of my select on the fly
  • SQL insert into statement leads to weird (cartesian product) result
  • check constraint sql server
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org