This article is transferred from:
Http://www.cnblogs.com/abcdwxc/archive/2007/12/11/990274.html
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Creates an index for a given table or view.Only the owner of a table or view can create an index for the table. The owner of a
Advantages and disadvantages of indexes
Why do you create an index? This is because creating an index can greatly improve the performance of the system. First, by creating a unique index, you can guarantee the uniqueness of each row of data in a
Transferred from http://talentluke.iteye.com/blog/1843868
Excerpt from http://book.51cto.com/art/200906/132406.htm
the pros and cons of 8.4.5 indexes and how to determine whether an index is needed
I believe readers know that indexing can greatly
How to Create helpcontextid in HTML Help Workshop, Press F1 in the vbprogram to pop up the corresponding context, the documents in chm format have been written, the tables of context and index file have been written. What should I do next? Please
Article attribution: http://feiyan.info/16.html, I want to write to myself, but found this June summed up very detailed. Moved right over here.With regard to the benefits of MySQL indexing, if the correct design and use of the indexed MySQL is a
Article attribution: http://feiyan.info/16.html, I want to write to myself, but found this June summed up very detailed. Moved right over here.With regard to the benefits of MySQL indexing, if the correct design and use of the indexed MySQL is a
Index type1. Unique index: Unique index does not allow two rows to have the same index value2. Primary KEY index: Defining a primary key for a table will automatically create a primary key index, which is a special type of unique index. The primary
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
From: Http://www.cnblogs.com/aspnethot/articles/1504082.html
Official statement:
Clustered Index
An index. The logical order of the key values in the index determines the physical order of the corresponding rows in the table.The clustered index
An index is a structure that sorts the values of one or more columns in a database table and uses an index to quickly access specific information in a database table.Depending on the capabilities of your database, you can create three indexes in the
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