mysql - JOIN tables by DATE column in MYSQLI' -

-

Text after "div class =" itemprop = "text">

I have some tables with the time series whose first column corresponds to the date of the data. I tried to merge them together on the basis of that column, but the query takes a lot of time.

Since the series is not very short, I guess it is trying to search through several entries to join this command. What is a way to optimize search? Maybe use a hash function, or MYSQL knows that the data has already been sorted

Thank you, thank you, the code below which is part of the execution is delayed. 

  Select a.PERIOD, a.INFLATION, b.GROSS_PRODUCT, c.EMPLOYMENT, d.EXCHANGE_RATE to add FLOOR_DATE to one of inflation Product B (a.PERIOD, 'Quarterly') B =. Include the period of employment on FLOOR_DATE (a.PERIOD, 'month') = join c.PERIOD PESO_DOLLAR d on FLOOR_DATE (d.PERIOD, 'month') = d.PERIOD

I have made the FLOOR_DATE () order to match the corresponding date, rounding down to the nearest quarter or month.


Comments

Post a Comment

Popular posts from this blog

winforms - C# Form - Property Change -

-
I have a form that has a property named car A class with many properties. The Properties is being displayed on the current car on the basis of some user actions that are being displayed. So I have to know whether the property has been allocated or set to zero. I'm aware of INotifyPropertyChanged , but in my case I'm not sure that since this change I have changed my car properties car do not want to monitor the property. Any idea how to accomplish this? In advance thank you If you have created a true asset in your class then You should be a great and setter, you can add the code directly to the form property in order to take action on the basis of "form": Public partial category Form 1: form {public form 1 () {InitializeComponent (); } // define car square public class car {public string name = string. Empty; } // private car to keep the value of the current car private variable _car = null; // Property of public form which you can ru...
Read more

java - Messages from .properties file do not display UTF-8 characters -

-
Image
In the form of a title, I can only add that if I enter the html file manually, then it Okay. View Rolver: & lt; Bean id = "templorellolver" class = "org.thymeleaf.templateresolver.ServletContextTemplateResolver" & gt; & Lt; Property name = "prefix" value = "/ web-nf / templates" /> & Lt; Property name = "suffix" value = ". Html" /> & Lt; Property Name = "Template Mode" Value = "HTML5" /> & Lt; Asset name = "cacheable" value = "wrong" /> & Lt; Property Name = "characterEncoding" value = "UTF-8" /> & Lt; / Bean & gt; & Lt; Bean id = "Template Engine" class = "org.thymeleaf.spring3.SpringTemplateEngine" & gt; & Lt; Property Name = "Temploreolar" ref = "Templarolver" /> & Lt; / Bean & gt; & Lt; Bean square = "org.thymeleaf.spring3.view.Thymel...
Read more

javascript - amcharts makechart not working -

-
I am trying to create an amiratars serial chart on my Durandal single page application. This chart was working fine on Chrome browser but it is not working on IE. Can you please help me in this regard. Error while using Amcharts. The Macchart () method does not support the object in this object in IE.
Read more