When you are creating a new index on a table, Table locks are applied for the duration of the index operation. For large tables, index creations can take a longer time and this prevents user access to the table till the index gets created.
However if you want to allow users to access the table even when new indexes are being created, you can do so using the ONLINE option. Here’s a query that shows how:
CREATE NONCLUSTERED INDEX IX_VendorAddress_AddressTypeID
ON Purchasing.VendorAddress(AddressTypeID)
WITH (ONLINE = ON)
Note: By default, the ONLINE option is set to OFF.
About The Author
Suprotim Agarwal, MCSD, MCAD, MCDBA, MCSE, is the founder of
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51 Recipes using jQuery with ASP.NET Controls and a new one recently at
The Absolutely Awesome jQuery CookBook.
Suprotim has received the prestigous Microsoft MVP award for nine times in a row now. In a professional capacity, he is the CEO of A2Z Knowledge Visuals Pvt Ltd, a digital group that represents premium web sites and digital publications comprising of Professional web, windows, mobile and cloud developers, technical managers, and architects.
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