Background: Recently modified a SQL Server table structure with large amounts of data, error "cannot modify table." Timeout time has arrived. The time-out elapses before the operation completes or the server is not responding. 】
Resolution: Tools, Options > Designer, Table Designer, and Database Designer, check the "Timeout for Table Designer update override connection string", and the "Transaction time-out" by default should be 30 seconds, which is slightly larger, But it doesn't seem to be more than 65535.
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How to fix the SQL Server table structure when the timeout time has arrived