SQL Data Sync - column type invalid for use as a key column

Question

Hello,
our sync group is failing to do the sync. Here's a tracingID:
For more information, provide tracing ID ‘e3e568b5-140a-4ae5-a4c8-c178c6bf805d’ to customer support.
I must say, that the column in DB is not a PK or INDEX-ed, it was initially VARCHAR(MAX), after some reading I changed it to VARCHAR(200) and later to TEXT, but the result of syncing is still the same.
Thank you,
Bojan

Answer 1

Hi Bojan,
The error “column type invalid for use as a key column” could be due to the existence of unsupported data types or column properties when implementing the synchronization. I recommend you check your database according to this article:
SQL Database Data Types supported by SQL Data Sync.
Besides, before you design and implement a data synchronization plan, please check the following articles about system requirements for SQL Data Sync and so on.
System Requirements for SQL Data Sync
https://msdn.microsoft.com/en-us/library/azure/jj127278.aspx
Known SQL Data Sync Limits
https://msdn.microsoft.com/en-us/library/azure/jj590380.aspx
SQL Data Sync Best Practices
https://msdn.microsoft.com/en-us/library/azure/hh667328.aspx
Thanks,
Lydia Zhang
Lydia Zhang
TechNet Community Support