apexsql plan

Label:Objective: Many places for the optimization of the sentence, generally more reliable reply even-the implementation of the plan to see. Of course, those who only look at the statement to say how to change the code, I have always refused, because this is pure Mongolian. According to my experience, a lot of performance problems simply from the statement to find the bottleneck, the same statement, due to different circumstances, the gap is very larg

test plans include: Create a test plan, version management, create a test plan to usePerform teststhe function. The test plan should include tasks that clearly define the time range and content. You can create a new version by changing the product requirements. It is recommended to use the Description field to correlate the document, the feature that needs to be

Today I want to talk about a very "simple" topic: How to read the execution plan. First of all, this looks like a very simple question, but when you look at the details of the answer, it's amazing. There are 2 ways to read the execution plan-from right to left, and from left to right. Let's look at it in detail, which is right ...from right to left? In SQL Server, when you start to deal with the execution

Cont.: http://blog.csdn.net/bisal/article/details/392253734.10046 EventsThe execution plan for the target SQL can also be viewed through the 10046 event. Events like 10046, which are not available in Oracle's official documentation, are typically used for debugging purposes, so they can often be used to find more detailed information about the problem. The difference between the 10046 event and the previous explain

Consider this situation: In most of the time, your stored procedures run well, but sometimes very poor, performance seems to have fallen from the ground up. Some people may say that the statistics are not updated in a timely manner, when you run it manually and view the execution plan, you will find that there is a big gap between the estimated number of rows and the actual number of rows, therefore, it is determined that the statistical information

There are two ways to get an execution plan in SQLSERVER: 1. enable some switches in front of the command so that the execution plan information can be entered in the result set, this method is suitable for tuning a single statement in a test environment. Among these switches, 1SETSHOWPLAN_ALLON23SETSHOWPLAN_ALLON --( There are two ways to get an execution plan i

4326:NOIP2015 Transport Plan Time limit:30 Sec Memory limit:128 MBsubmit:308 solved:208[Submit] [Status] [Discuss] DescriptionIn the 2044 A.D., humans entered the cosmic era. L State n Planets, there are n−1 two-way waterway, each channel is built between two planets, this n−1 waterway connected to all the planets of L country. Little P is in charge of a logistics company, which has many transport plans, each of which is a logistics spaceship

I. Problem Analysis: 1. Do you want to stop and work continuously when the tomato rings? Analysis: Do not want to stop: 1. I think the time is not enough and I don't want to take too much time off. The essence is that I have not made an effective plan. 2. What I have done is starting to do, I am afraid to forget my thoughts due to interruptions. I don't know what to do during the rest period? What if I can't stop my car when I click the web page? To s

Each part of the test plan: Should the company have a goal in doing anything? Yes, the test plan itself is no exception. That is:Test Plan objectivesOf course, we want to test specific software. What is the background of this software? It is also composed of the main functional modules, which is an overview of the composition of the test

Sometimes the development of table structure design, whether the table field is empty is too casual, such as id1 = id2, if the field is allowed to be empty, because the Oracle empty value is not equal to the null value, unexpected results may be obtained. In addition, NULL affects the execution plan of oracle. The following is a test example where NULL affects the execution plan. /* 1. Construct the test ta

The following methods are used: (1) Start SQL Server Management Studio and select Administration-the Maintenance plan option in the Object Explorer window. 2 Right click on "Maintenance Plan" and select the "Maintenance Plan Wizard" option from the pop-up shortcut menu , eject the Maintenance Plan Wizard dialog

A maintenance plan can be used in SQL Server 2005 to automatically back up the database, reducing the workload of the database administrator. Here's how to use it:(1) Start SQL Server Management Studio and select Manage-maintenance plan option in the Object Explorer window.2) Right click on "Maintenance Plan" and select "Maintenance

Sometimes the development of the table structure design, is too random to table field is empty, such as ID1=ID2, if the Allowed field is empty, because the Oracle hollow value is not equal to null value, it is possible to get unexpected results. Beyond that, the key is that null affects Oracle's execution plan.The following null affects the test example for the execution plan./*1. Build test table, where create table is constructed with the test sheet

Absrtact: The development of website Promotion program is also a kind of website promotion strategy, the promotion plan is not only promotes the action guide, simultaneously also is examines the promotion effect whether achieves the anticipated goal the measure standard. The website promotion plan should include at least three basic content: the website promotion stage goal, the website promotion method whi