mysql: ROLLUP on TOP, SUM(FINANCIAL AMOUNT), then order FINANCIAL AMOUNT column by DATETIME DESC

Question

Table 1

CREATE TABLE tblFinancials
(
pkFinancialID int(11) NOT NULL AUTO_INCREMENT,
fkUserID int(11),
fkProfileID int(11),
fkFinancialEntryID int(11),
FinancialAmount decimal(10,2),
FinancialDateTime datetime
);

pkFinancialID  fkUserID  fkProfileID  fkFinancialEntryID  FinancialAmount  FinancialDateTime
1              1         1            1                   100.00           2014-06-07 07:00:00
2              1         1            2                   100.00           2014-06-08 08:00:00

Table 2

CREATE TABLE tblFinancialEntry
(
pkFinancialEntryID int(11) NOT NULL AUTO_INCREMENT,
FinancialEntry varchar(255)
);

pkFinancialEntryID  FinancialEntry
1                   Credit
2                   Debit

Table 3

CREATE TABLE tblUsers
(
pkUserID int(11) NOT NULL AUTO_INCREMENT,
UserName varchar(255)
);

pkUserID  UserName
1         Test User

Table 4

CREATE TABLE tblProfiles
(
pkProfileID int(11) NOT NULL AUTO_INCREMENT,
fkUserID int(11),
ProfileName varchar(255)
);

pkProfileID  fkUserID
1            1

Desired query result:

Total Due:      0.00
             -100.00   2014-06-07 07:00:00
              100.00   2014-06-08 08:00:00

Answer 1

I'll leave the debit/credit thing for you to incorporate:

select concat(
   case when T.pkFinancialID is null 
        then 'Total Due:     '
        else '               '
   end,  cast(FinancialTotalAmount as char(20))
   ) 

 , case when T.pkFinancialID is null
        then null
        else FDateTime
   end
from (
    select pkFinancialID
     , max(FinancialDateTime) as FDateTime
     , SUM(CASE WHEN fkFinancialEntryID = 1 
                THEN 1 
                ELSE -1 
       END * FinancialAmount) as FinancialTotalAmount
    from tblFinancials 
    WHERE tblFinancials.fkUserID = 1 
      AND tblFinancials.fkProfileID = 1 
    group by pkFinancialID with rollup
) as T  
order by case when T.pkFinancialID is null then 0 else 1 end
       , FDateTime;


Total Due: 0.00     (null)
         100.00     June, 07 2014 07:00:00+0000
        -100.00     June, 08 2014 08:00:00+0000