The main considerations for designing SQL Server indexes are as follows:Check where condition and join condition column;Use narrow index;Check the selectivity of the column;Check the data type of the column;Consider the order of the columns;Consider
The main considerations for designing SQL Server indexes are as follows:Check where condition and join condition column;Use narrow index;Check the selectivity of the column;Check the data type of the column;Consider the order of the columns;Consider
The main considerations for designing SQL Server indexes are as follows:Check where condition and join condition column;Use narrow index;Check the selectivity of the column;Check the data type of the column;Consider the order of the columns;Consider
clustered index, nonclustered index, nonclustered unique indexWe all know that establishing an appropriate index can improve query speed and optimize queries. First, whether a clustered or nonclustered index is a B-tree structure .
The
first, the storage structureIn SQL Server, there are many different options available for arranging rules.Binary: Sort by the numeric representation of the characters (ASCII, with the number 32 for spaces, and 68 for the letter "D"). Because
clustered index, nonclustered index, nonclustered unique indexWe all know that establishing an appropriate index can improve query speed and optimize queries. First, whether a clustered or nonclustered index is a B-tree structure .
The
Start from Create
By using the explicit CREATE INDEX command
As an implied object when creating a constraint
Implicit indexes created with constraintsAn implicit index is created when you add one of the following two constraints to
First, the storage structureIn SQL Server, there are many different options available for arranging rules.Binary: Sort by the numeric representation of the characters (ASCII, with the number 32 for spaces, and 68 for the letter "D"). Because
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