[Solved] Cannot resolve symbol ++ in Scala
type Set = Int => Boolean defines Set to mean a function from Int to Boolean. There is no ++ method on functions. That’s it. 0 solved Cannot resolve symbol ++ in Scala
union
[Solved] Show data from multiple tables by date and time [closed]
Yes it is, like “Tom asked a question:__ in:__ few minutes a go” So you need a user name, an action, a timestamp and a hidden id. Well performance-wise a separate table is better (you avoid unions and maybe joins if it’s not necessary to be mormalized), but you have the extra storage (is this … Read more
[Solved] Selecting the right column
Both. In some rows, t2.number is number and in others t3.number is number. The result of the union all in a single result set. The result set doesn’t know the origin of the values in any particular column (although you could include another column with this information). 3 solved Selecting the right column
[Solved] How to combine three queries?
I’m sure you can work this out yourself.. I guess it needs to look something like this.. but you don’t say how you want the data to be combined so I’ve just just a cross product (the WHERE 1=1) of the last data set to a union of the first two with PH AS( SELECT … Read more
[Solved] MYSQL: Search for User ID in one table to search for data in 2 other tables, then show data from all 3 tables
SELECT * FROM section_user_map JOIN users USING (UID) JOIN verification USING (UID) WHERE SectionID = 65 AND CompleteDate BETWEEN ‘2012-05-09 12:00:00’ AND ‘2012-05-11 12:00:00’ See it on sqlfiddle. No UNION required. Outer join would only be required if you still want to return results for users who do not exist in one (or both) of … Read more