I need help with a SELECT SQL query that will left join with another table on id column, which will in turn return the latest values based on time, grouped into a single row? Basically, join the two tables in such a way that for each record in users table that exists in time_series table, return the latest va…
Tag: inner-join
How to update table with data from another table
I have two tables First table INTRA.TABLE_A Second table EXTRA.TABLE_B And I am trying to get data from INTRA.TABLE_A into EXTRA.TABLE_B with update: But it “throws” syntax error at FROM word: syntax_error After update, result should looks like: I am using sqlDeveloper and Oracle database. How can…
making sure only an existing user in the table can add a record in PostgreSQL
I have something like fb groups, where people can be moderators. If a user wants to add a moderator to a certain group, I’d like to check that first of all he himself is a moderator of this group. …
Simplify nested queries
select name from person, author, article where name != “John Doe” AND person.pid = author.pid AND author.aid = article.aid AND title = select title from …
How to keep only one entry among several in PostgreSQL database
I have a database that monitors a network (snapshots table, that contains a snapshot_date column). This production database was flooded by a faulty crontab, resulting in many snapshots for the same device every day. I don’t won’t to remove everything, but i want to keep only one snapshot per snaps…
Comparing each colum in a row to every row in the database sql
I am building a bot that matches users based on a score they get, this score is taken from calculations done to data in a database on the request of the user. I have only 1 table in that database and a few columns (user,age,genre,language,format,…etc). What I want to do is, once the user clicks “f…
Get total Sum from SQL Query of two tables
I have two tables which are as follows: Table1 and Table2. Table1 : Table2: I want a SQL query which would show me the result in total manner. The Output that I want is : I have done it using the PowerBI and I know it can be done using SQL too but I am not able to achieve it.
MYSQL – Fetching entities whose many-to-many relationship contains all terms collectively
I am using the following DB Schema and using something like this to add data/query it which returns How can I return recipes who’s ingredients are a subset of a list of ingredients provided? e.g I should not return Chocolate cake if list (egg, salt, sugar) is provided. However I should return Chocolate …
How to make a start on this SQL query homework? [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 2 years ago. Improve this question A mov…
Oracle Merge – Can I do something like “When Not Matched Then Delete”?
I have a table (t1) with a unique list of patients. I have another table (t1_Backup) with a duplicative list of patients and details. I would like to essentially perform an inner join to update t1, …