I need to calculate the average score of a list of userId.
I have a table user_place_score:
(user_id, place_id, score)
Sometimes I do not have the score (no row for (user_id,place_id) in the table) ...
In mysql 5.7.28 I create a table like this:
create table t1 (
id int not null,
which works fine and creates d1 as non-null with default value current_timetamp,on update ...
I'm trying to generate dummy tables with dummy data for testing performance with some SQL tasks.
Based on this old thread: Is there a way to insert multiple rows into a table with default values for ...
CREATE OR REPLACE TYPE MISSING_KEYS AS TABLE OF VARCHAR2(256);
SELECT [¿what goes here?] as missing_key
FROM TABLE (MISSING_KEYS('A','B','C','D'))
What is the default column name that should be in [¿...