I have a table as below:- id | columnA | columnB | columnC 1 7234 3432 3245 2 1237 1123 6546 3 4421 9371 7324 4 1244 1424 4237 How can I select …
How to group data within a range of contigious timestamps
I have a table made up of rows of data collected through an indeterministic polling process. Each row has a start and end timestamp denoting the time period in which the data was collected. In some …
How can create a new table from another after Calculate Some Field
I have a table called WorkSpace with 4 columns. Each record in this table refers to their parent record through the Parent_id column. You should continue this cycle until you reach the main parent …
Changing upload controller from supporting .xlsx to .csv
I have an MVC application which allows an admin user to upload 2 different excel file onto the system; the controller then creates a dataset with the excel data and then populates either a “Schools” …
SQL query to find out the single record by 3 conditions
Can you please help me with the query to find out the single record for the each student based on the subject.(Id,Name,subs are primary key). Ideally I will have 2 records for each subject. One with …
PostgreSQL parse countries in array against the countries table
We have content and country tables. Country is pretty simple: country_name column defined as string: Albania, Belgium, China, Denmark etc… Content is a table with half a million of rows with various data with countries column defined as array text[]. Each value there has a number of countries concatenat…
I have 3 table and need exclusive left join
Table_1: Table_2: Table_3: Using 2 left joins I got this: But I do group over the first column and 8 is accumulated twice, I wish to get: I also wish to avoid UNION ALL because my first table is actually a complex query, I wish to avoid its recalculation. https://dbfiddle.uk/?rdbms=postgres_12&fiddle=d601…
how to get single result in using 2 table data
i have to table 2 in same structure .i already get the result by using one table using following query this query will time devide in to the 2 part(time in and time out) .it work fine.now want to get the data from anther table also.it also have same structure attendancedata table. attendancedata table structu…
i can’t Merge two tables
i have one tables attendance main table i created 2 views from attendance table attend view and leaved view view:attend view:leaved after that i used this code to merge attend and leaved view the result was like this result i need each employee has attend time and leaved time in same day Answer This following…
Handle Group by different way in postgres
This query getting result like below But i want group by hour like Answer you can use case when hour to merge multi hours to time range then group it.