MS ACCESS Lock a table during update, blocking

Question

How can I lock a table preventing other users querying it while I update its contents?

Currently my data is updated by wiping the table and re-populating it (i know, its not the best way to update data, but the source data has no unique key to do a record by record update and this is the only way). There exists the unlikely, but possible scenario where a user my access the table in the middle of the update and catch it while it is empty thus returning bad info.

Is there at the SQL (or code) level a way to create a blocking statement that will wait for a DB update to complete prior to querying?

Answer 1

Access has very little locking capabilities. Unless you're storing your data in a different backend, you only can set a database-wide lock or no lock at all.

There is some locking capability setting table locks when the table structure of a table is being changed, but as far as I can find, that's not available to the user (neither through the GUI nor through VBA)

Note that both ADO and DAO support locking (in ADO by setting the IsolationLevel , in DAO by setting dbDenyRead + dbDenyWrite when executing the query), but in my short testing, these options do absolutely nothing in Access.