Suppose I have these records ID 1: has attributes A,B,D ID 2: has attributes B,C ID 3: has attributes F ID 4: has attributes C,G …..(Attributes will not duplicate in the same …
spark [dataframe].write.option(“mode”,“overwrite”).saveAsTable(“foo”) fails with ‘already exists’ if foo exists
I think I am seeing a bug in spark where mode ‘overwrite’ is not respected, rather an exception is thrown on an attempt to do saveAsTable into a table that already exists (using mode ‘overwrite’). …
Sort by Name first then number in sql query from a delimited string
We have designed to register customer’s station-division records in 1 field. So the table rows looks like this. create table test4 (f2 varchar(100)) insert into test4 (f2) values (‘A08-0100’) insert …
Flask SQLAlchemy query join
I have 2 table like this: Then I try to making 2 kinds of query to get data for the relationship models. first, I make it like this: and the second one I use join statement on that: My questions are, what’s the difference in that query while in the second one I use the join statement but the result
How to insert NULL into decimal type column using PHP?
I’m trying to insert NULL into a column, called price, which is of type Decimal. The column is nullable and the default is NULL. I want to insert NULL, only when nothing has been entered in the “…
Is ok to use functions to format columns inside OVER PARTITION BY?
I got a column that its maximum length is 8 characters, but usually it has less. I tried to normalize it, using the RIGHT function. It works very well on JOINS, and it doesn’t show syntax errors when …
Conditional join in SQL Server dependent on other table values
I need make a decision which table should be use in join statement depend on values in another table I tried using CASE and COALESCE but can’t achieve any success. TableA has A and B and C and many …
How to extract the package name using regexp_substr
I’d like to extract the package name using regexp_substr. For example: create or replace package body something.pkg_test is I want that: pkg_test I tried to use lookbehind just to ignore “…
SQL How to create a job that runs once a day and updates a table based on what is missing?
I have a simple table called Z_N_FullRetailTable that has an Item_Number, Color_Code, and Retail Price. I created this table manually. However, sometimes we add items to our collection so I would …
CASE to sum column based on boolean
I have: Then I group by to get the counts but how do I sum X when Y is TRUE only? Or get the % of A in relation to true/untrue? Answer how do I sum X when Y is TRUE only?