Error - subquery returning more than one value

Originally Posted by Aleck

Hie.

I have a trigger that monitors changes to my table fields but I get an error saying subquery returned more than one value.Below is the code for my trigger, hope you will figure out whats happening..

CREATE TRIGGER trgmyTableAuditFields ON myTable
WITH ENCRYPTION
FOR INSERT, UPDATE, DELETE
AS
BEGIN

DECLARE @col VARCHAR(200)
DECLARE @primarykeycol VARCHAR(200)
DECLARE @sql VARCHAR(2000)
DECLARE @action VARCHAR(200)
DECLARE @AuditInsert BIT
DECLARE @AuditUpdate BIT
DECLARE @AuditDelete BIT

SELECT @action =
CASE
WHEN (SELECT COUNT(*) FROM deleted) = 0 THEN 'INSERTION'
WHEN (SELECT COUNT(*) FROM inserted) = 0 THEN 'DELETION'
ELSE 'UPDATE'
END

DECLARE curAuditFields CURSOR FOR
SELECT c.[name], ac.[AuditInsert], ac.[AuditUpdate], ac.[AuditDelete]
FROM syscolumns c
INNER JOIN sysobjects o ON o.[id] = c.[id]
INNER JOIN aucAuditColumns ac ON ac.[Column] = c.[name] AND ac.[Table] = o.[name]
WHERE o.[name] = 'myTable'
AND c.[xtype] NOT IN (35, 99, 34)
OPEN curAuditFields

FETCH NEXT FROM curAuditFields INTO @col, @AuditInsert, @AuditUpdate, @AuditDelete

SELECT [EffectiveDate],[LowerThresholdAmount],[ThresholdAmount],[Percentage],[ID] INTO #new FROM inserted
SELECT [EffectiveDate],[LowerThresholdAmount],[ThresholdAmount],[Percentage],[ID] INTO #old FROM deleted

WHILE @@FETCH_STATUS = 0 BEGIN

IF (@action = 'INSERTION' AND @AuditInsert = 1) OR
(@action = 'UPDATE' AND @AuditUpdate = 1) OR
(@action = 'DELETION' AND @AuditDelete = 1)
BEGIN

SET @sql = 'IF (SELECT [' + @col + '] FROM #new) <> (SELECT [' + @col + '] FROM #old) OR (SELECT COUNT(*) FROM #old) = 0 OR (SELECT COUNT(*) FROM #new) = 0 BEGIN' + CHAR(10) +
' DECLARE @old VARCHAR(50)' + CHAR(10) +
' DECLARE @new VARCHAR(50)' + CHAR(10) +
' DECLARE @RecordVal VARCHAR(50)' + CHAR(10) +

' SELECT @new = CAST([' + @col + '] AS VARCHAR(50)) FROM #new' + CHAR(10) +
' SELECT @old = CAST([' + @col + '] AS VARCHAR(50)) FROM #old' + CHAR(10) +
' SELECT @RecordVal = CAST([ID] AS VARCHAR(50)) FROM #old' + CHAR(10) +
' IF @RecordVal IS NULL BEGIN' + CHAR(10) +
' SELECT @RecordVal = CAST([ID] AS VARCHAR(50)) FROM #new' + CHAR(10) +
' END' + CHAR(10) +

' INSERT INTO AuditTable([Username], ModificationDate, SourceTable, ModifiedField, OldValue, NewValue, [Action], [RecordID])' + CHAR(10) +
' VALUES (''' + SUSER_SNAME(SUSER_SID()) + ''',''' + CAST(GETDATE() AS VARCHAR(20)) + ''', ''myTable'', ''' + @col + ''', @old, @new, ''' + @action + ''', @RecordVal)' + CHAR(10) +
'END'
EXEC (@sql)
END

FETCH NEXT FROM curAuditFields INTO @col, @AuditInsert, @AuditUpdate, @AuditDelete
END

DROP TABLE #new
DROP TABLE #old

CLOSE curAuditFields
DEALLOCATE curAuditFields
END