bmc plan

Create a test table Connect with user Jyu, create test table sql> conn Jyu/jyu; Connected.sql> CREATE TABLE T (ID number, name VARCHAR2 (100)); Table created. sql> INSERT INTO T select Rownum,object_name from dba_objects;47391 rows created. Sql> commit; Commit complete. To create an index sql>. t_idx1 on t (ID), index created. Collect statistics sql> exec dbms_stats.gather_table_stats (' Jyu ', ' T ');P L/sql procedure successfully completed. Execution

Brief introduction The nature of the SQL statement we write is simply the logic to get the data, not the physical path to get the data. When we write SQL statements to SQL Server, Query Analyzer parses statements sequentially (Parse), bindings (BIND), Query optimizations (optimization, sometimes referred to as simplification), execution (Execution). In addition to the execution steps, the first three steps are followed by the execution plan, where SQ

Reprint: http://www.51testing.com/html/10/n-3725610.html Elements of the test plan (elements of a test plans) This section describes the different parts of the test plan. 　 　The minimum test will include a test plan, a thread group, and one or more samplers. 1. Test plan the test

Tags: good htm val sum add out of memory lookup www. Find YouTo understand the execution plan, you have to understand it, the various nouns. Since I don't know much about it. This article is intended as a write-only, do not understand the understand before writing. At the beginning, it is important to note that the first time you look at the execution plan, theSQL Server execution

This question cannot be directly used with the expense stream. It will be TLE, because only a better solution can be output, so the evacuation plan can be implemented after a round-trip. Time limit:1000 ms Memory limit:65536 K Total submissions:2401 Accepted:616 Special Judge DescriptionThe city has a number of municipal buildings and a number of fallout shelters that were build specially to hide municipal

Http://poj.org/problem? Id = 2175 Evacuation Plan Time limit:1000 ms Memory limit:65536 K Total submissions:3256 Accepted:855 Special Judge DescriptionThe city has a number of municipal buildings and a number of fallout shelters that were build specially to hide municipal workers in case of a nuclear war. each fallout shelter has a lim

NOIP2015 Transport PlanDescriptionIn 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 that needs to fly from the UI number planet to Planet VI. Obviously, it takes time for the spacecraft to sail through a fairway, and for Fairway

As mentioned earlier, there are two different types of execution plans, the first is the output of the optimizer, which is the predictive execution plan, where the operators or steps are logical steps, because they represent the view of the execution plan in the optimizer, but do not represent the physical aspect of the actual execution. Another plan is to repre

Oracle Execution Plan (2)-Cardinality Executes the cardinality column for the plan. Cardinality is the number of rows of data returned from a datasheet, result set, or index. cardinality = table row Data * selection rate. So the cardinal point is to talk about the selection rate, the calculation of the selection rate. Version 10G default table space information: Tablespace_name USERS

Label:[Date: 2011-08-05]Source: Linux Community wangshengfeng1986211[Font: Big Small]2010-07-01 15:031. SET AUTOTRACE on EXPLAIN(Set AUTOT on exp)The Sqlplus command, which displays the execution plan while executing the SQL statement, sets exp (lain) to show only the execution plan without displaying statistics:2. Sql>explain Plan for select "";Sql>select * FROM

Tags: style blog http color os using AR strong SP1. each execution of the SQL statement generates an execution plan and is cached because the execution plan is generated with time overhead, so reusing the execution plan can improve performance and save buffer space. We can use Sys.dm_exec_cached_plans, sys.dm_exec_sql_text, sys.dm_exec_query_plan to query the cac

One: Execution plan generation processWhen it comes to execution planning, the first thing to know is the process of executing the plan, so that you can do it, and I'll draw a diagram below:1. Analysis ProcessThese three are easier to understand, first of all we have to ensure that SQL syntax can not be wrong, select and join tables must exist, and you have to execute this SQL permissions, the wrong ...So w

Label:The content is mainly from the reading study notes, the following records the common query execution plan method. 2.2 How to view the execution plan1.explain Plan2.dbms_xplan Bag3.autotrace4.10046 Events5.10053 Events6.awr/statspack report (@?/rdbms/admin/awrsqrpt)7. Script (Display_cursor_9i.sql)2.2.1 Explain planExplain plan for SQLSELECT * FROM table (dbms_xplan.display);Sql> explain

Introduction The SQL statements we usually write are essentially the logic for obtaining data, rather than the physical path for obtaining data. When the SQL statements we write are passed to the SQL Server, the query analyzer parses, binds, and optimizes the statements in sequence), Execution (Execution ). In addition to the execution steps, the execution plan is generated after the first three steps, that is, the SQL Server obtains physical data acc

Chinese March 7, 2007, the grand start of the Chinese network to increase 100 million registered capital. It is understood that the starting point after the increase in capital will further increase the support of the original author of the network, which will launch the "quadrillion plan" has aroused great concern. Pole Chinabyte This special interview the beginning of the Chinese network general manager Wu Wenhui. Pole chinabyte: First of all to the

Database maintenance keeps the database running at optimal state. Creating a Database maintenance plan allows SQL Server to effectively automate the maintenance of databases, save time for administrators, and prevent delays in database maintenance. The process of creating a database maintenance plan is as follows: (1) In Enterprise Manager, select the database in which you want to create a maintenance

Tags: result mechanism img Memory Plan back nbsp round ManySQL query procedure　　　　　　When executing an SQL statement or stored procedure, the approximate process for SQL Server is1. Analyze the query statement, generate a logical unit, and perform a basic grammar check2. Build a query tree (all operations in a query statement are converted to operations on the base table, such as converting a view to a base table query)3. Generate execution

The storage outline and SQL plan baseline storage outline are designed to provide stable execution plans to eliminate the impact of changes in the execution environment or object statistics. Therefore, this feature is also called Plan stability. Specifically, the storage outline is a collection of prompts. More precisely, all these prompts force the query optimizer to generate a Special execution

? In Oracleperformancetuningguide, the execution plan sequence is described as the rightmost and rightmost execution first, and then the parent step is executed, that is, the rightmost step is executed first. If it is of the same level, then, execute the parent step first (TheexecutionorderinEXPLAINPLANoutputbeginswith ). ? In the Oracle performance tuning guide, the execution plan sequence is described as

The new Year is always a new vision and goal, the annual plan (Resolution). Two months ago, the founder of Facebook, Mark Zuckerberg, visited Beijing and made more than 30 minutes of lectures and questions and answers in Chinese at Tsinghua University, which impressed everyone. Not only in the domestic media, many mainstream American media use "surprise Canary" to describe his Chinese ability.I remember about 4 years ago, Mark invited me to the Silico