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This article will explain in detail how to add an index in plsql. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

An index is a structure that sorts the values of one or more columns in a table and provides quick access to specific information in a database table. If you want to find a particular employee by his or her last name, the index helps you get information faster than searching all the rows in the table.

One of the main purposes of the index is to speed up the method of searching the data in the table, that is, it can help the information searcher to find the auxiliary data structure of the record ID which meets the restriction as soon as possible.

To put it simply, according to the sql statement, add an index to the post-where conditions in the database, then each search will first go to the index to find conditions, saving search time. such as

Select * from user where name='tom' and age='16'

Then you can add the index of name and age to this sentence, and it should be noted that the order of the two fields in the index also needs to be based on the order after the where statement.

Then the way to add an index in the plsql graphical interface is to select the right-click edit of the corresponding table, and there will be an index option in the navigation above. After clicking in, the primary key is indexed by default, and you can continue to add the index you need.

On how to add an index in plsql to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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