webex plans

first, the index MongoDB provides a variety of index support, the index information is saved in System.indexes, and the default is always to create an index for _ID, its index uses the basic and MySQL and other relational database. In fact, it can

Because the B*tree index does not store null values, some Oracle queries do not use indexes when the indexed field is allowed to be empty. Most of the time, it appears that we can use a full index scan, which may give Oracle the chance to discard

1 The easiest way is to log in with the Pl/sql tool, select the SQL statement, and then press F5; 2 with Pl/sql tool login, open command Window A) execution: Explain plan for SELECT * dual;--red part can be replaced with your SQL statement b)

SQLSETAUTOTRACEONSQLSELECTSYSDATEFROMDUAL; sysdate------------26- September-12 execution plan execution ERROR: anuncaughterrorinfunctiondisplayhashappened; pleasecontactOraclesupportPlease SQL set autotrace on SQL SELECT SYSDATE FROM DUAL; SYSDATE --

Ubuntu developers will soon be able to experience many improvements to the long-awaited UbuntuApp Development Platform SDK. JonoBacon of Canonical has shared some new details about developers working on platform acceleration in Florida last week,

& Nbsp; Source: CSDNOracle Technical Forum & nbsp ;: myepoch proposes that the same SQL statement has a huge difference in execution efficiency because of the retrieval value. Problem Environment: Oracle10g, tbnc_adminpowerscope table has B tree

According to foreign media reports, the European branch of the Free Software Foundation (FSFE) said on Friday that Oracle should hand over the MySQL database to an independent non-profit organization to allow the EU to approve Oracle's acquisition

Solution: recreate plan_table, SQLgt; droptablePLAN_TABLE; SQLgt ;@? After rdbmsadminutlxplan is completed, the problem is solved. Solution: recreate plan_table, SQLgt; drop table PLAN_TABLE; SQLgt ;@? /Rdbms/admin/utlxplan The generated

The storage outline can be used to fix the SQL Execution Plan. The storage outline consists of a series of optimizer hints related to SQL statements. When the storage outline is available, oracle automatically generates an execution plan for the

After the Megaupload attack, the DoS (denial of service) cannon of the hacker organization Anonymous seems to have been suspended recently. In February 28, Anonymous used their dostool "Low Orbit Ion Cannon" to attack the Interpol website, but the

  The figure above shows the major items of the software plan. I will detail them one by one:   I. Problem definition: 1. Definition content: Problem background, development system status quo, development conditions and reasons, overall

In the winter of 1976, I was 19 years old and worked at the Space Shuttle lab at Houston Space Administration, and majored in computer science at the University of Houston next to the General Administration. Even when I was busy with school, sleep,

The surfaceflinger Service is responsible for drawing the UI of the Android Application. Its implementation is quite complex. It is not easy to analyze its implementation from the front. Since we cannot analyze the data from the front, we can try to

The surfaceflinger Service is responsible for drawing the UI of the Android Application. Its implementation is quite complex. It is not easy to analyze its implementation from the front. Since we cannot analyze the data from the front, we can try to

Zhang Huiting, a career management consultant, believes that a person's career development can be divided into five stages, grasp the problems that may occur in each stage, and plan in advance so that he can take the initiative. The first hurdle:

Clear data and execution plan cache: DBCC DROPCLEANBUFFERSDBCC FREEPROCCACHE Open statistics: SET STATISTICS IO ON SET STATISTICS TIME ON Open the execution plan: SETSHOWPLAN_TEXT ONSETSHOWPLAN_ALL ONSETSTATISTICS PROFILE ONSETSHOWPLAN_XML

The preliminary question is the superposition and display of two-dimensional vector data and DEM data.   The most urgent problem to be solved is 1. Different Light sources can be set based on different regions, and different shadows can be

At the end of October, Microsoft released a black-screen patch for XP users-the Windows Edition Value-Added Program Notice, and Microsoft also released a patch similar to the office verification. There are already many solutions to the XP black

A problem occurred recently. The example table structure is as follows: set statistics io on use tempdb go --drop table TB create table TB (id int identity primary key, parentId int,name varchar(50)) go insert into TB(parentId,name) select

Method 1 Step 1: log on to SQL/plus to execute the command (no sequence is available) Set Time on; (Note: Enable time display) Set autotrace on; (Description: Enable Automatic Analysis Statistics and display the running results of SQL statements)