mysql create multiple select to put max in all rows - mysql

Question

This is my table with sample data:
Table:PersTrans
+------------+-------------+------+-----+------------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+-------------+------+-----+------------+-------+
| PersTrID | char(10) | NO | PRI | | |
| PersTrSeq | int(11) | NO | PRI | 0 | |
| PersTrDate | date | YES | | 1001-01-01 | |
| PersTrPaid | float(9,2) | YES | | 0.00 | |
+------------+-------------+------+-----+------------+-------+
mysql> select * from PersTrans;
+------------+-----------+-----------+-------------+
| PersTrID | PersTrSeq | PersTrDate | PersTrPaid |
+------------+-----------+-----------+-------------+
| MOCK | 1 | 2015-10-10 | 400.00 |
| MOCK | 2 | 2017-11-07 | 10.00 |
| NAGA | 1 | 2015-11-11 | 500.00 |
| NASSA | 1 | 2015-12-16 | 800.00 |
+------------+-----------+-----------+-------------+
I'd like to pick up the maximum PersTrSeq, and attach it to all the records that have the same PersTrId. What I want:
+------------+-----------+------------+------------+----------------+
| PersTrID | PersTrSeq | PersTrDate | PersTrPaid | max(PersTrSeq) |
+------------+-----------+-----------+------------+-----------------+
| MOCK | 1 | 2015-10-10 | 400.00 | 2 |
| MOCK | 2 | 2017-11-07 | 10.00 | 2 |
| NAGA | 1 | 2015-11-11 | 500.00 | 1 |
| NASSA | 1 | 2015-12-16 | 800.00 | 1 |
+------------+-----------+-----------+------------+-----------------+
These two attempts didn't work. I've looked for other suggestions but haven't found anything helpful.
mysql> SELECT *, max(PersTrSeq) from PersTrans where PersTransId = 'Mock' group by PersTrSeq;
+------------+-----------+------------+------------+----------------+
| PersTrID | PersTrSeq | PersTrDate | PersTrPaid | max(PersTrSeq) |
+------------+-----------+-----------+------------+-----------------+
| MOCk | 1 | 2015-10-10 | 400.00 | 1 |
| MOCK | 2 | 2017-11-07 | 10.00 | 2 |
+------------+-----------+-----------+------------+-----------------+
mysql> SELECT *, max(PersTrSeq) as maxseq from PersTrans group by PersTrId;
+------------+-----------+------------+------------+--------+
| PersTrID | PersTrSeq | PersTrDate | PersTrPaid | maxseq |
+------------+------------+-----------+------------+--------+
| MOCK | 1 | 2015-10-10 | 400.00 | 2 |
| NAGA | 1 | 2015-11-11 | 500.00 | 1 |
| NASSA | 1 | 2015-12-16 | 800.00 | 1 |
+------------+-----------+-----------+------------+---------+
Can anyone offer a single query that will get the result I'm looking for?

Answer 1

Following query will work:
select *,
(select max(PersTrSeq) from PersTrans p2
where p2.PersTrId = p1.PersTrId
) as maxSeq
from PersTrans p1;

Answer 2

If I understand what you want, you want the same number of records as the actual data, substituting the max(PersTrSeq) for all rows with a certain PersTrID.
SELECT
`PerTrID`,
(SELECT max(`PersTrSeq`) FROM `PersTrans` b WHERE b.`PersTrID = a.`PersTrID`) as `PersTrSeq`,
`PersTrDate`,
`PersTrPaid`,
from `PersTrans` a