Interview Questions
1. What is Column-store index?
A column-store index stores data in a column-wise (columnar) format, unlike the traditional B-tree structures used for
clustered and non-clustered row store indexes, which store data row-wise (in rows). A column-store index organizes the data
in individual columns that are joined together to form the index. This structure can offer significant performance gains for
queries that summarize large quantities of data, the sort typically used for business intelligence (BI) and data warehousing.
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