编写SQL查询以根据另一个表中的值获取所有记录（非联接情况）

Question

I have two tables, Account and Tracking
Account table has an ID (int data type)
Tracking table has AccountID (FK) and Status (string data type)

I want to write MySQL query.

My goal is to get all accounts whose theirs ID number bigger than the biggest ID number recorded in Tracking table

OR

all accounts that have Status "Failed" in Tracking table.

Kindly help

Answer 1

I am considering the question as 2 different queries. You can use sub query, if you don't want to use join.

Query1:

select * from Account where id > (select max(AccountID) from Tracking);

Query2:

select * from Account where id in (select distinct AccountID from Tracking where status = "Failed");

Answer 2

If I understand correctly:

SELECT  *
FROM    Account a
        JOIN Tracking t
            ON a.ID = t.AccountID
WHERE   (a.ID > (SELECT MAX(AccountID) FROM Tracking)) OR
        (t.Status = 'Failed')

you need a regular join but use a subquery to get the "ID larger than" part of your OR statement