With the development of the Internet, users pay more attention to the browsing speed and effect of the Web site, but because of the proliferation of netizens, the network access path is too long, so that the quality of access of users is seriously affected. Especially when the link between the user and the website is congested with large traffic data, the poor quality of access is an urgent problem for the region with rapid increase of internet users. How to enable users everywhere to make high-
Materialize, materialized
Material Design (Material DesignIs a design language that combines the classic principles of successful design with innovative technologies. Google's goal is to develop a design system that gives all products a unified user experience on any platform.
Materialize is a modern responsive front-end framework based on material design. They do the most heavy work, provide you with the
WITH + HInt MATERIALIZE is not necessarily valid. It must be materialized after multiple calls. It is called only once, and MATERIALIZE syntax is useless: MATERIALIZE Description: indicates that the optimizer materialized the inline view-a temporary view is created during execution.
[sql] with dd as (select object_type,owner,object_Id from dba_objects) selec
With as: A subquery is a part of the independent, sometimes to improve the readability of SQL statements, sometimes to Improve the Performance of SQL statements. If a table in an SQL statement is accessed multiple times with the same access conditions, you can use with as to improve the performance. Note: If the with as phrase is not called more than twice, CBO will not talk about the data obtained by this phrase into the temp table, if you want to add data to the temp table, you need to use
, it will affect theSQLThe part that runsSQLput in with ASinside, the result is still the same. Later try to putHINT materialize and with AS are used in conjunction with the following SQL, the query speed is improved a lot. For example, as seen in the. the Not EXISTS of the FILTER in the run plan does not exist. With PARAMS as (SELECT ' user_id, ' sdate, '% ' | | '' || '% ' SNAME from DUAL), Usernamedata as (SELECT/*+
"(+)) 11-filter (" SA "). Longitude "is not NULL" 12-access (To_number ("longitude") >119.191148 and To_number ("LATITUDE") >26.074423 and To_number ("longitude") This execution plan looks incredibly normal and should be left join.The key to the problem, however, is the 10 step-MERGE JOIN Cartesian. The sorting of the Cartesian product merges connections, which takes a long time.Waiting for this result will take dozens of seconds, even longer!How to solve such problems, there are s
Tags: style io color OS using SP for strong onWhen we use with, Oracle may convert the results in with into a temporary table, which is just possible because the CBO will judge. Inline is not converted to a temporary table, and materialize is coerced into a temporary table.Manufacturing datadrop table Test1 Purge;drop table Test2 purge;drop table Test3 Purge;CREATE TABLE Test1 as SELECT * from Dba_objects;CREATE TABLE Test2 as SELECT * from User_objec
ORACLE uses with as and hint materialize to optimize SQL to solve low FILTER efficiency and hintmaterializeZookeeper
During project creation, a page uses SQL statements similar to the following to query data, I replaced the table name and field in the project with the system table and field in the ORACLE database.
In my project, a table similar to ALL_TABLES contains more than pieces of data, and the query SQL below is very slow.
WITH PARAMS AS (SEL
When we use with, Oracle may convert the results in with into a temporary table. This is only possible, as the CBO will infer.Inline is not converted to a temporary table. Materialize is forced into a temporary table.Manufacturing datadrop table Test1 Purge;drop table Test2 purge;drop table Test3 Purge;CREATE TABLE Test1 as SELECT * from Dba_objects;CREATE TABLE Test2 as SELECT * from User_objects;CREATE TABLE Test3 as SELECT * from Dba_objects;exec d
Upper (A.KSPPINM) like Upper ('%param% ')7 Order BY name/8Enter value for param: _with_subqueryOld 6:and Upper (A.KSPPINM) like Upper ('%param% ')New 6:and Upper (A.KSPPINM) like Upper ('%_with_subquery% ')NAME VALUE DESCRIPTION---------------------------------------------------- ------------------------ ------------------------------_with_subquery OPTIMIZER with subquery transformationSql> alter system set "_with_subquery" =materialize;System altere
Created and designed by Google, Material design is a design language that combines the classic principles of successful design with innovative technology. Google's goal is to develop a design system that allows all products to have a unified user experience on any platform.Materialize is a modern, responsive front-end framework based on material design. They do the heaviest work, providing you with a default style that combines your custom components. In addition, they also improve animations a
With the development of the Internet, users pay more attention to the browsing speed and effect of the website when they use the network, but because of the increasing number of netizens, the network access path is too long, so that the quality of users ' access is seriously affected. Especially when the link between the user and the website is congested with large traffic data, the poor access quality is an urgent problem to be solved for the area where Internet users are rapidly increasing. Ho
CDN is believed that many friends are not unfamiliar, the Internet also often see related reports. A period of time before the major CDN service provider response to the Prime Minister call, CDN also speed down the cost, like a Web-host CDN, Aliyun CDN have a large price ran
The application of CDN technology is more and more widely used by major internet companies. has become an Internet enterprise inseparable from a network operation and maintenance mode. What is a CDN?CDN leverages global load balancing technology to direct users ' access to the most recently working streaming media server, which is directly responsive to user requ
Now we build a Web site project for a wide range of users, there are domestic and foreign customer base, especially in the domestic user group we also have telecommunications, mobile, unicom and so on different lines of difference. Generally we buy the virtual host, VPS server only one IP address, certainly no merchant to ensure the stability and speed of 100% lines, if we buy the host when the merchant and you said to ensure a certain stability is a lie.
In view of this, we will consi
Big talk content delivery network (CDN), big talk content delivery cdn
Content Delivery Network (CDN)The concept1995ByMassachusetts Institute of TechnologyProposed,YesAllows users to access the nearest network.Solution.The specific method is:Smart routing and traffic management technologies are used to direct users' access requests to healthy and fastest-respondi
if the speed of establishing a connection, it should be CDN fast. Because the CDN is directly to connect to a recent edge server, and peer generally to first go through the hash value to DHT or tracker to ask the node information, get some neighbor IP, and then to establish a connection. The problem, though, is that the neighbours have a bad quality, and some may be repeating parts that may have been closed
with the development of the Internet, users pay more attention to the browsing speed and effect of the Web site, but because of the proliferation of netizens, the network access path is too long, so that the quality of access of users is seriously affected. Especially when the link between the user and the website is congested with large traffic data, the poor quality of access is an urgent problem for the region with rapid increase of internet users. How to make high-quality access to users eve
According to the survey, with the development of Internet video,CDN cost accounted for the proportion of Internet overall platform cost, which is more than 70% in video company. CDN Industry - listed companies reported that the cost of bandwidth and servers accounted for the CDN cost has reached 70%. over the past more than 10 years, the traditional
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.