Mysql – Query outer join fixed values
I would like to query some IDs (fixed values) into a table, like a "outer join" with the mandatory fields should be the fixed values. I have to do the same for SQLServer and MySQL, but with one solution I…
Amazon web services – How can I join data to my table that isn't available for everyone without losing results?
I have a main table, Table 1, that includes columns for student ID and some other info. There is also Table 2 which includes columns for student ID, survey question, and response. Essentially, I want to append Table 2 to…
Postgresql – Is there a way to delete / update duplicate values in a time sequence?
I have a table that looks like (never mind the database vendor as I need this in ANSI SQL): create table edge ( parent_id int not null, child_id int not null, value float not null, start date not null, end…
How to fix 'must be an aggregate expression or appear in GROUP BY clause' with 'as' clause in Presto?
This question is similar to another one, but I'm providing a simpler example. The other query was too advanced to make sense to me. Sample (fake) data id gender kg 4f5a07ca-02e0-8981-3c30-4d9924a169a3 male 103 4f5a07ca-02e0-8981-3c30-4d9924a169a3 male 85 4f5a07ca-02e0-8981-3c30-4d9924a169a3 male 469 e05d54e9-8292-b26c-5618-8a3712b4fc44…
Mysql – Unable to write a query which will return the data of date, products and assortment with same date
I have a table like sales(product_number, assortment, date) Here 1 assortment contains multiple products. For example 1 assortment i.e. chocolates contains product_number cadbury, 5 star, kitkat etc. Each and every product has date. I'm trying to check that all products…