LogParser is your friend: http://www.microsoft.com/en-us/download/details.aspx?id=24659
Here is a sample command to import the data into SQL Server:
LogParser -i:EVT "SELECT * into prodEvents FROM c:\temp\prod.evtx" -o:SQL -server:sqlServerName -driver:"SQL Server" -database:testDb -createtable:ON -cleartable:ON -transactionRowCount:-1 -maxstrfieldlen:8000
note: use -username:test -password:test to specify username and password if you need to.
note: I cant seem to find a way around the 8000 character limit in LogParser. So it always truncates at 8000 characters :(
The table definition is:
CREATE TABLE [dbo].[prodEvents](
[EventLog] [varchar](8000) NULL,
[RecordNumber] [int] NULL,
[TimeGenerated] [datetime] NULL,
[TimeWritten] [datetime] NULL,
[EventID] [int] NULL,
[EventType] [int] NULL,
[EventTypeName] [varchar](8000) NULL,
[EventCategory] [int] NULL,
[EventCategoryName] [varchar](8000) NULL,
[SourceName] [varchar](8000) NULL,
[Strings] [varchar](8000) NULL,
[ComputerName] [varchar](8000) NULL,
[SID] [varchar](8000) NULL,
[Message] [varchar](8000) NULL,
[Data] [varchar](8000) NULL
) ON [PRIMARY]
Keep in mind that you can run many SQL like queries directly against the EVT file locally on your machine without importing the data into a table.
Other useful queries:
logparser.exe -i:evt "select * from c:\temp\prod.evtx where timegenerated > '2015-09-01 00:00:00'"
More info:
Useful commands and tips: (for ASP.net, but useful even for Event Logs) https://support.microsoft.com/en-us/kb/910447
