The SQL index allows to find quickly a string which matches my query. Now, I have to search in a big table the strings which do not match. Of course, the normal index does not help and I have to do a
We have a mid-size SQL Server based application that has no indexes defined.Not even on the the identity columns.I su开发者_如何学运维ggested to our moderately expensive application consultant that pe
I am running some queries in my database and want to increase the performance and have created some indexes but I still think that the response time is to great so I want to see if I can create a bett
I have some questions on Composite Primary Keys and the cardinality of the columns. I searched开发者_运维问答 the web, but did not find any definitive answer, so I am trying again. The questions are:
My specific concern is related to the performance of a clustered index on a reference table that has many rapid inserts and deletes.
I am working on a windows application using Lucene. I want to get all the indexed keywords and use them as a source for a auto-suggest on search field. How can I receive all the indexed keywords in Lu
I am sorry if this is a dumb question (cause it sounds unlikely). I have a table t开发者_开发技巧hat is 20 Million rows. However, only about 300K of these rows get accessed regularly, and they can be
When 开发者_运维知识库should I use a primary key or an index? What are their differences and which is the best?Basically, a primary key is (at the implementation level) a special kind of index. Spec
This question already has answers here: Does dropping a table in MySQL also dr开发者_运维百科op the indexes?
im triying to do an app using the notepad tutorial of Android as a guide. I can insert new elements on the table without problems, but if i want to update the fields of one of this elements an error i
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