I rewrite some code from SAS to Python using Pandas library. I’ve got such code, and I have no idea what should I do with it? Can you help me, beacase its too complicated for me to do it correct. I’ve changed the name of columns (for encrypt sensitive data) This is SAS code: This is my try in Pand…
How to display rows with no count aggregate result?
I have a table which contains Job, City and PersonName (who works in that city). I want to return all jobs and cities even if there is no one working in that city. This is a simple example : Creation of the table : My Query My result But I would like to have : I have no clue how
pylint equivalent for SQL?
python having pylint scala having Scalastyle I searched around but didn’t find a style checker for SQL. Does it exist? Thank you. Answer You don’t require any error checker for Sql, as Sql is not a programming language. They IDE you use will help you to understand the issue in the query and can be…
Create custom field by subtracting column values from two different rows based on multiple IDs
I have to create custom column by subtracting column values from two different rows based on multiple IDs. Data set is like below: ID2 is different for each date. Now I have to display custom field like below: Repeated for other ID2 also. Please suggest how should I proceed. I tried using Cross Join but but n…
Add check constraint related to other column
My table structure is as below I want to add a constraint to this table where only if IsActive=1, GoSequence value can be change. If IsActive=0, GoSequence stays 0. Any help is appreciated. Thanks! Answer Probably the simplest way of expressing that is that either GoSequence must be 0 or IsActive must be 1. S…
How to fetch a column name which has maximum value from each group in postgres?
I got stack when i try to return maximum value in this query. Here is my query It is showing me the output like this according the query But i want the maximum product_service_name. my expected output is I tried with max(ps.product_service_name) but it did fetch unexpected result. it will be really helpful if…
Update table value from a second table by joining a third table
I have 3 tables, TableA, TableB and TableC I want to migrate the data from TableA column DateA to TableB column DateB, only if the date field is null in table B (I don’t want to overwrite any …
Convert rows to columns using PIVOT
I have a table named AmountList in SQL Server : where Primary key is ” UniqueCol1, UniqueCol2, AmountID ” and on the basis of AmountID I want to Pivot the results as: I am facing the challenge using Pivot because only Aggregate functions can be used but I need actual values of the fields. UPDATE: …
Oracle SQL Error Code ORA-06502: PL/SQL: numeric or value error: character string buffer too small at line 18
I have been stuck trying to fix this error for a while and I cannot figure it out. I have researched this error code and the problem is I am trying to store a number/char that cannot fit into a variable. Everything looks fine within my code and I cannot find the problem. Here is the Student table information:…
Return the second newst record of a group sql
I have a table like the following: how can I get this: the result should be the second newest record of a coworker if there’s more than one, or the only present Thanks for any help! Answer Try the following with window function row_number. Here is the demo. Output: