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Starting from Oracle11g, it provides a new method of fixed Execution Plan, namely SQLplanbaseline, the Chinese name SQL Execution Plan baseline (baseline for short), which can be considered as OUTL Starting from Oracle 11g, it provides a new method for fixed execution plans, namely, SQL plan baseline, a Chinese-name SQL Execution

This article originates from TTT BLOG, original address: http://blog.chinaunix.net/u3/107265/showart_2192657.html Brief Introduction: This article comprehensively introduces the related concepts of Oracle execution plan, accessing data access methods , the connection between tables, and so on. and a summary and overview, easy to understand and memory! +++ Directory---one. Related concept ROWID concepts recursive SQL concept predicate (predicate) driv

Introduction: This article provides a comprehensive overview of the relevant concepts of the Oracle execution plan, accessing data access methods, linking between tables, and more. and a summary and overview, easy to understand and memory! +++ Directory---one. Related concept ROWID concepts recursive SQL concept predicate (predicate) driving table (Driver table) probed table (probed table) combined index (Concatenat Ed index) optional (selectivity) Tw

The knowledge about Oracle database implementation plans is what we will introduce in this article. We first introduce the concept of implementation plans, and then give examples of two implementation plans, finally, we introduced the form of the Oracle optimizer and the purpose of the plan. Let's take a look at this part.What is a strong plan?The so-called implementation of the

Label:Oracle Database View Execution planOracle-based application system many performance problems are caused by poor application SQL performance, so, SQL performance optimization is very important, analysis and optimization of SQL performance we generally look at the SQL implementation plan, this article on how to understand the implementation plan, And how to optimize SQL by analyzing the execution

Read Catalogue Begin How SQL Server looks for records SQL Server Join method More specific execution procedures Index statistics: The choice of the query plan is based on Optimizing View Queries Recommended Reading-MSDN Articles For SQL Server optimizations, tuning queries can be a common thing. Due to the optimization of the database, it is also a wide-ranging topic, so this article only discusses how to understa

Comments: When I started learning HTML5, I am very interested in Geolocation. Using Google Map APIs to implement basic Map location functions, I mainly take the following steps: obtain the current geographic location and call the Google Map API to obtain the current location information. This course is just learning HTML5. Now, I am very interested in the Geolocation, and use the

Xinhua News Agency, San Francisco, September 24 (reporter Ma daN)-Google Inc. of the United States said the "Google balloon" intended to popularize the Internet to underdeveloped areas will form a circle around the southern hemisphere within a year, send wireless Internet signals to the ground. He also said that "Google balloon" will send LTE (long-term evolution

If you want to move the Google Chrome path around the Internet, you just need to find the offline package under the default installation path and move the decompressed file to the desired location, then, when the shortcut is started, add -- User-data-Dir = "My location" to move the user data location. Disadvantages of this method: 1. automatic update is unavailable. 2. user data is only available at the specified location when the shortcut for setti

The habit of using Google for a long time. However, Google is always unhappy,Do you feel like this. When using Google, you may encounter problems such as unavailability or slowness. It is estimated that this is not just a network problem. Why can I access other websites at the same time. Ah, why? Sima Zhao's heart. Although not happy, it still doesn't make me giv

Today, after the update blog program, suddenly found that Google Toolbar PR bar added a little, but has been the Google Toolbar PR because of the buffer problem, so that the current display of the PR value is not necessarily the current page PR value, so to check the next, found blog site (HTTP/ mlsx.xplore.cn/) PR value rose to 3, but the home page (http://mlsx.xplore.cn) is still 2. Rattling, celebrate. B

Maybe you and I, almost every day must deal with the search engine, but most of the time, you worked hard to search for half a day and did not find the right information, but "experts" come up in the blink of an hour can hit the target. This is not the luck of others, but the search engine is actually has a lot of tricks to help you better find the content you want.However, it is said that more than 3/4 of people are not making better use of Internet search. So today to share with you a very val

Today, one of my colleagues sent me an email asking me how to use Google + Google puls normally. I am not a fairy, and I have no good solutions, it was also found on the Internet-using the hosts file to parse Google's service, but when I sent my hosts file to my classmates, he still could not access it normally, in addition, an error message of Error 404 is displayed, and this error prompt is the same for m

A large collection of Google image sites and a large collection of google image sitesIt is quite difficult to get rid of google. We recommend some google image sites below. Of course, we should share some good things with you!The following images are divided into the original and non-original images. The non-original i

So what does Google Sitemap do for search engine optimization? First, as mentioned above, can let search engine crawl page will be more, now we each new station will give them to add a site map to make the search engine better crawl the content of the site. Second, in the Google Site map management interface, you can clearly see which pages are spiders do not crawl to, which are dead links cause spiders c

I have previously reported that Google will be launched through Google analytics Google AdSense features, today, I login AdSense backstage has seen the invitation to this feature, I set up after the initial trial of it, feeling very good, Strongly recommended for use. Before using the AdSense account and analytics account number binding, if you use these two fun

Tags: find return cache response free temporary analysis CCache cannotSQL Server submits a user-submitted DML statement that, through a series of optimizations, produces a scenario that can be identified and efficiently "responded" by SQL Server using the Ctrl+m (actual execution plan) in Ctrl+l (estimated execution plan)Committing a DML statement (CRUD) can cause a series of activities.1. Activities that o

Tags: rom mit nested RAC row index driver who statementHow to read Oracle Execution Plan First, what is the implementation plan An explain plan is a representation of the access path, that's taken when a query is executed within Oracle. Second, how to access data At the physical level Oracle reads blocks of data. The smallest amount of data read is a single Orac

Read SQL Server query planRead Catalogue Begin How SQL Server looks for records SQL Server Join method More specific execution procedures Index statistics: The choice of the query plan is based on Optimizing View Queries Recommended Reading-MSDN Articles For SQL Server optimizations, tuning queries can be a common thing. Due to the optimization of the database, it is also a wide-ranging topic, so this article only