May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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sys.dm_exec_query_stats
The sys.dm_exec_query_stats DMV displays cumulative query execution statistics for all the queries that are currently in the cache. As we observed in the previous section, the DMV sys.dm_exec_requests shows query performance while the query is executing. Once the query is complete, sys.dm_exec_query_stats is incremented with this new execution information. While query execution plans are stored as a batch, this DMV lists one row per statement, so there may be multiple rows with the same plan_handle and sql_handle. statements. These rows will have a different statement_start_offset and statement_end_offset to distinguish between the statements in the same batch.
There are many different query performance metrics that ...
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