How to wirte a query for updating two tables at a time? - sql-server-2008

Question

HI i have two tables in my database named...Requests and Balance tracker which has no relation....but i want to select data from two tables and binf it two grid...
Requests
EmpID |EmpRqsts|EmpDescription|ApproverID|ApprovedAmount|RequestPriority
1 |asdfsb |sadbfsbdf |1 |
2 |asbfd |sjkfbsd |1 |
Balance Tracker
EmpId|BalanceAmnt|LastUpdated|lastApprovedAmount
| 1 |5000 |sdfbk |
| 2 |3000 |sjbfsh |
now i want to update based on the EmpID two tables at a time...when ever amount is approved it should be updates in request table column [ApprovedAmount] and with priority...
when [ApprovedAmount] is Updated [BalanceAmnt] Balance Tracker of also should be Updated by adding the amount approved,[LastUpdated],[lastApprovedAmount] should be updated with date and time
can any one help me with the query please....

Answer 1

#Anil, here is an example of SQL Server 2008 code which would help you to get your goal acomplished:
DECLARE #Requests TABLE
(
EmpId int
, EmpRqsts nvarchar(50)
, EmpDescription nvarchar(250)
, ApproverID int
, ApprovedAmount money
, RequestPriority int
)
DECLARE #BalanceTracker TABLE
(
EmpId int
, BalanceAmnt money
, LastUpdated datetime
, lastApprovedAmount money
)
-- Insert data for testing
INSERT INTO #Requests VALUES
(
1
, 'Something here'
, 'Some descriptio here'
, 1
, 100
, 1
)
INSERT INTO #Requests VALUES
(
2
, 'Something here 2 '
, 'Some descriptio here 3'
, 1
, 215
, 2
)
INSERT INTO #BalanceTracker VALUES
(
1
, 5000
, GETDATE() - 3
, 310
)
INSERT INTO #BalanceTracker VALUES
(
2
, 3000
, (GETDATE() - 1)
, 98
)
-- Declare local variables
DECLARE
#NewAmount money
, #NewPriority int
, #SelectedEmpId int
-- Assing values for example
SELECT #NewAmount = 1000
, #SelectedEmpId = 1
, #NewPriority = 5
-- Get the tables values pre - updates
SELECT *
FROM #Requests
SELECT *
FROM #BalanceTracker
BEGIN TRY
-- Update the record with new ApprovedAmount and Request Priority
UPDATE #Requests
SET ApprovedAmount = #NewAmount
, RequestPriority = #NewPriority
WHERE EmpId = #SelectedEmpId
-- If no error found then update BalanceAmnt trable
IF (##ERROR = 0)
BEGIN TRY
UPDATE #BalanceTracker
SET BalanceAmnt = (BalanceAmnt + #NewAmount)
, LastUpdated = GETDATE()
, lastApprovedAmount = #NewAmount
WHERE EmpId = #SelectedEmpId
END TRY
BEGIN CATCH
PRINT N'Error found updating #BalanceTracker table: ' + ISNULL(LTRIM(STR(ERROR_NUMBER())) , N'Unknown Error' )
+ N', Message: ' + ISNULL ( ERROR_MESSAGE() , N'No Message' )
END CATCH
END TRY
BEGIN CATCH
PRINT N'Error found updating #Requests table: ' + ISNULL(LTRIM(STR(ERROR_NUMBER())) , N'Unknown Error' )
+ N', Message: ' + ISNULL ( ERROR_MESSAGE() , N'No Message' )
END CATCH
-- Get the tables values post - updates
SELECT *
FROM #Requests
SELECT *
FROM #BalanceTracker
Note 1: #Table are Variable Tables handlded by SQL Server 2008. If you're using previous version you should be able to create Temporary Table (#Table).
Note 2: data data-types may vary depending upon the SQL version you're using.

Answer 2

You could do this type of thing with a trigger. This way whenever you do the first update, it will automatically do the other update you specify.