If having a table looking like this: last_updated, uuid, headline, topics 2020-01-01, abc123, “BigQuery is nice”, [‘big query’, ‘data warehousing’, ‘trouble’] 2020-01-02, abc123, “…
How to find unique combinations for a table column in SQL?
I’ve below table: Test create table test (Id char) insert into test values (‘A’), (‘B’), (‘C’), (‘D’), (‘E’) Fiddle Link for testing Expected Output: a.ID b.ID A B A C A D A …
“Error when converting the nvarchar value “–” to the int-data type.”
I haven’t been working with SQL for that long because I’m still relatively new to the world of IT specialists. Currently I’m working on a report for an automated documentation and get the following …
Only include values from the latest timestamp into the query result
DB-Fiddle CREATE TABLE sales ( id int auto_increment primary key, time_stamp TIMESTAMP, product VARCHAR(255), sales_quantity INT ); INSERT INTO sales (time_stamp, product, …
Is it possible to lock on a value of a column in SQL Server?
I have a table that looks like that: Id GroupId 1 G1 2 G1 3 G2 4 G2 5 G2 It should at any time be possible to read all of the rows (committed only). When there will be an …
Add constraint to multiple columns only if one of them is true
I have this table CREATE TABLE user ( user_id BIGINT NOT NULL, modified_date DATE NOT NULL, is_relevant BOOLEAN NOT NULL, more columns… ); I have a table of users, and I save …
FIRST & LAST values in Oracle SQL
I am having trouble querying some data. The table I am trying to pull the data from is a LOG table, where I would like to see changes in the values next to each other (example below) Table: +———…
Count No of column value matched and not matched in SQL
I have a dataset where in I am trying to find the count of values matched in a column and count of values not matched. Also I am trying to find out same and different values . Eg. ID F1 F2 F3 A1 …
Iterate through timestamps and calculate difference between them
DB-Fiddle: /* Sales */ CREATE TABLE sales ( id int auto_increment primary key, time_stamp DATE, product VARCHAR(255), sales_quantity INT ); INSERT INTO sales (time_stamp, product, …
Left join without using view
I have a table structure similar to this: users | id | name | |—-|——–| | 1 | jane | | 2 | john | client | id | name | user_id | |—-|————|———| | 1 | client 1 |…