The ONLINE option allows concurrent user access to the underlying table or clustered index data and any associated nonclustered indexes during these index operations. For example, while a clustered index is being rebuilt by one user, that user and others can continue to update and query the underlying data. GeoPITS brings you the comprehensive details of Online indexing's support in different versions & editions of SQL Server.
| Version | Enterprise | Standard | Web | Express (Adv.) | Express |
|---|---|---|---|---|---|
| Version v2019 | Yes | ||||
| Version v2017 | Yes | ||||
| Version v2016 | Yes | ||||
| Version v2014 | Yes | ||||
| Version v2012 |
The ONLINE option allows concurrent user access to the underlying table or clustered index data and any associated nonclustered indexes during these index operations. For example, while a clustered index is being rebuilt by one user, that user and others can continue to update and query the underlying data
You can find more details about this version here
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