Wait statistics provide a starting point for investigation. Separate cumulative completed waits, background activity, signal time and currently waiting requests before treating the largest total as the present bottleneck.
SQL SERVER – Keywords View Definition Must Not Contain for Indexed View – Limitation of the View 10
A quick reference of the keywords a view definition must not contain if you want an indexed view in SQL Server, part 10 of my views series.
SQL SERVER – SELF JOIN Not Allowed in Indexed View – Limitation of the View 9
Self Join is handy, but it is not allowed in indexed view definitions. Limitation of the view 9 reuses my employee and manager example to show it.
SQL SERVER – Get Numeric Value From Alpha Numeric String – Get Numbers Only
Reader Christofer improved my logic to get a numeric value from alpha numeric string data. His stored procedure uses REVERSE and PATINDEX.
SQL SERVER – Outer Join Not Allowed in Indexed Views – Limitation of the View 8
Why is an outer join not allowed in indexed views? Rows can logically disappear when you insert into a base table. Limitation of the view 8 shows an example.
SQL SERVER – Cross Database Queries Not Allowed in Indexed View – Limitation of the View 7
An indexed view needs WITH SCHEMABINDING, and that rules out cross database queries. Limitation of the view 7 walks through it with two test databases.
SQL SERVER – UNION Not Allowed but OR Allowed in Index View – Limitation of the View 6
UNION not allowed in an indexed view can surprise you. Limitation of the view 6 shows the script that fails and how the OR operator is allowed instead.