clustered-index

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SQL Server database with clustered GUID PKs - switch clustered index or switch to sequential (comb) GUIDs?

We have a database in which all the PKs are GUIDs, and most of the PKs are also the clustered index for the table. We know that this is bad (due to the random nature of GUIDs). So, it seems there are[详细]

2022-12-26 00:01 分类：问答
Should searchable date fields in a database table always be indexed?

If I have a field in a table of some date type and I know that I will always be searching it using comparisons like between, > or < and never = could there be a 开发者_运维知识库good reason not[详细]

2022-12-24 09:24 分类：问答
Does clustered index on foreign key column increase join performance vs non-clustered?

In many places it\'s recommended that clustered indexes are better utilized when used to select range of rows using BETWEEN statement. When I select joining by foreign key field in such a way that thi[详细]

2022-12-23 03:22 分类：问答
Primary Key / Clustered key for Junction Tables

Let\'s say we have a Product table, and Order table and a (junction table) ProductOrder. ProductOrder开发者_JS百科 will have an ProductID and an OrderID.[详细]

2022-12-22 15:10 分类：问答
Difference between Cluster and Non-cluster index in SQL

Just for knowledge in interview question,开发者_StackOverflow社区 and my knowledge. SQL - Difference between Cluster and Non-cluster index?A link describing the two.[详细]

2022-12-22 06:33 分类：问答
How to convert clustered primary key to non-clustered without dropping referring foreign keys in SQL Server 2005

I\'ve made mistake creating clustered primary key on GUID column. There are many tables that reference that table with defined 开发者_StackOverflow中文版foreign keys.[详细]

2022-12-20 11:20 分类：问答
What does this sentence mean: Clustered indexes are stored physically on the table?

How are clustered indexes stored on a hard disk?What is the logical order? How do non-clustered in开发者_StackOverflowdexes work?This means that the data in the table are stored in a B-Tree according[详细]

2022-12-20 09:20 分类：问答
Clustered vs NonClustered Primary Key

begin transaction; create table person_id(person_id integer primary key); insert into person_id values(1);[详细]

2022-12-17 08:46 分类：问答
SQL Server: How does the type of an index affect a join's performance?

If I\'m am trying to squeeze every last drop of performance out of a query what affect does having these types of index\'s being used by my joins.[详细]

2022-12-16 10:52 分类：问答
Covering indexes when extra columns uniquely determined by clustered index

Suppose I need to update myTab from luTab as follows update myTab set LookupVale = (select LookupValue from luTab B[详细]

2022-12-14 13:50 分类：问答