i got it failed at Data Flow Task from excel to SQL server database. anyone know how to resolve?

[OLE DB Destination [413]] Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft SQL Server Native Client 11.0" Hresult: 0x80004005 Description: "Unspecified error".

[OLE DB Destination [413]] Error: There was an error with OLE DB Destination.Inputs[OLE DB Destination Input].Columns[Copy of Revenue Month] on OLE DB Destination.Inputs[OLE DB Destination Input]. The column status returned was: "The value violated the integrity constraints for the column.".

[OLE DB Destination [413]] Error: SSIS Error Code DTS_E_INDUCEDTRANSFORMFAILUREONERROR. The "OLE DB Destination.Inputs[OLE DB Destination Input]" failed because error code 0xC020907D occurred, and the error row disposition on "OLE DB Destination.Inputs[OLE DB Destination Input]" specifies failure on error. An error occurred on the specified object of the specified component. There may be error messages posted before this with more information about the failure.

[SSIS.Pipeline] Error: SSIS Error Code DTS_E_PROCESSINPUTFAILED. The ProcessInput method on component "OLE DB Destination" (413) failed with error code 0xC0209029 while processing input "OLE DB Destination Input" (426). The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running. There may be error messages posted before this with more information about the failure.

Hi @nononame2021 ,

It usually happens when Allow Nulls option is unchecked.

Look at the name of the column for this error/warning.
Go to SSMS and find the table
Allow Null for that Column
Save the table
Rerun the SSIS

Or you may use ISNULL([Your Column]) and then load data.

Regards,

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"The value violated the integrity constraints for the column.".

A clear error message, there is a primary/foreign key constraint on the destination table and the data you are trying to load violated against that constraint.
You have to ensure PK/FK integrity.