oracle performance tuning basics

operation This is it, the next we add to SQL Server on the use of the index and dynamic index content, About indexes I believe that many people who understand database products are familiar with it, but the way in which some statements in SQL Server take advantage of the index may not be clear, our next analysis of this piece, to understand the indexing method and optimization techniques, interested in advance attention, about SQL Server performance

In the case of performance problems with Oracle databases, it is less effort to use Oracle's own toolkit to give reasonable tuning recommendations.Tuning Advisor is optimized for the execution plan of the input SQL setThe Accsee Advisor is a recommendation on how much performance is improved if SQL set is introduced in

SQL _PLAN_BASELINE View: SELECT SQL_HANDLE, PLAN_NAME, ENABLED, ACCEPTED, FIXED FROM DBA_SQL_PLAN_BASELINES; SQL_HANDLE PLAN_NAME ENA ACC FIX------------------------------------------------------------------------SYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741a57b5fc2 YES NO NOSYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741f554c408 YES YES NO 6. SQL Management Base SQL Management Base (SMB) is part of the data dictionary that resident the SY

Refer to the book SQL. server.2005. Technical Insider "series ConclusionThis article first to this bar, the article is short, easy to understand, follow-up on the parallel operation of a part of the content, follow-up articles, this article mainly introduces the parallel operators in the query plan, next we will add some of the SQL Server parallel operations, Then analysis of our daily write additions and deletions to these operators to optimize the items, interested in advance attenti

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storage, but the benefits are largely negligible. Conclusion This article first of all, this article mainly describes the T-SQL statement tuning from the execution plan of the following, and introduced a few common simple operators, the next one will focus on some of our most commonly used operators and tuning techniques, including: Join operators, aggregation operators, union operators, parallel operati

Oracle Objective Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It h

of data ... God horse is not as good as Oracle ...!!!There are some children's shoes simply think that SQL Server is pediatrics, there is no technical content ... It's very simple.On these points, I don't want to spit out anything, I just want to let those friends who really know SQL Server to prove something to SQL Server.At the end of the article, we give a link to the previous articleSQL Server Tuning S

, next we will add some of the SQL Server parallel operations, Then analysis of our daily write additions and deletions to these operators to optimize the items, interested in advance attention, about the SQL Server performance tuning of the content is very broad, followed by the analysis in the article.If you have any questions, you can leave a message or private messages, and look forward to an in-depth s

), or (or), and not (non). Not can be used to negate any logical operation symbol. The following is an example of a NOT clause: ... where not (status = ' VALID ') If you want to use not, you should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to ( . : Where status For this query, it can be rewritten to not use not: SELECT * FROM employee where salary Although the results of thes

MySQL from getting started to mastering (performance testing and tuning)Course View Address: HTTP://WWW.XUETUWUYOU.COM/COURSE/33Courses from the School of worry-free network : http://www.xuetuwuyou.com/Starting from the basics, all the way up to the advanced level, including but not limited to SQL statements, SQL Tuning