mysql - Should there be data in a relationship table(Many-to-Many) or should it be in a separate table? -

-

डेटा को संबंध तालिका से अलग किया जाना चाहिए।

लघु पक्ष प्रश्न: यदि केवल 1 स्टॉक प्रति उपयोगकर्ता हो तो । क्या मुझे समग्र कुंजी को प्राथमिक कुंजी में user_stock तालिका में

उपयोग करना चाहिए?

यह एक रिलेशन टेबल नहीं होना चाहिए .. उपयोगकर्ता स्टॉक तालिका मास्टर टेबल के रूप में कार्य करेगी। उपयोगकर्ता कुंजी के रूप में यूजर आईडी और स्टॉक आईडी यूजर _id लेन-देन तालिका में अद्वितीय नहीं होगा


Comments

Post a Comment

Popular posts from this blog

java - org.apache.http.ProtocolException: Target host is not specified -

-
I have written a simple httprequest / response code and I am getting this error below: I used to type in my classpath httpclient, httpcore, common -Codecs and general logging. I am very new to Java and I do not know what's going on here. Please help me. code: import org.apache.http.client.HttpClient; Import org.apache.http.client.methods.HttpGet; Import org.apache.http.HttpResponse; Import org.apache.http.impl.client.HttpClientBuilder; Import org.apache.http.Header; Import org.apache.http.HttpHeaders; Public class UnshorteningUrl {public static zero main (string [] args throws exception {HttpGet request = zero; HTTP Client Client = HTTP ClientBuilder.credit (). Build (); Try {Request = New HTTP Gate ("trib.me/1lBFzSi"); HttpResponse httpResponse = client.execute (request); Header [] header = httpResponse.getHeaders (HttpHeaders.LOCATION); // Preconditions.checkState (headers.length == 1); String new url = header [0] .getValue (); System.out.println ("new url...
Read more

ios - Subclassing UIView and adding a property -

-
I've tried UIView subclassing. Because I want an enum in my UIView so I can check whether UIView has to tap into my game twice. But I do not have much experience with subclassing and it is not working Make subclasses Build assets within a custom subclass Change sub-squares from UIView in the storyboard Change all UIView announcements from my game class in the subclassic declaration Code: #import & lt; UIKit / UIKit.h & gt; Type-FED NSNUm (NSITF, VISU SATAT) {ENNYMALAPEP, EUNDUBEBELTAP}; @ Interface bannerview: UIView @property (nonatomic, assign) viewStaat staatVanDeView; @end and declare a property in the INIT from the UIVVI. @setuphesize staatVanDeView; - (id) initWithFrame: (CGRect) frame {self = [super initWithFrame: frame]; If (self) {staatVanDeView = ENUMDubbelTap; NSLog (@ "Set"); } Healthy return; } The log is not being called, so I do not know what is wrong. The integer 0 stays at all times from staatVanDeView . method...
Read more

Powerbuilder 12.1 and DataWindow in Design vs Debug and Executable/Runtime -

-
I have a very strange situation with Powerbuilder 12.1. I have two issues that can be related - mainly because this is the exact same data window report. Problem # 1: You can not see the contents of Detavindo any and went nowhere, lost the ability to debug and display content Detavindo at runtime during the debug and runtime. But when you go into the data window in design mode, it prompts for the values ​​of those parameters, the content is only displayed, it is okay. Edit: Solve. This is due to a powerbiller that uses an integer rather than a long variable. The identity identifier in the database exceeds the upper limit of a PowerBuilder 16-bit integer (32767). I updated the logic for longer use, and resolved this problem # 1. ISSUE # 2: When I run the report code using the same data window mentioned in issue # 1 above, in debug mode, to create a new report file, this work Done - only in DEBUG mode Runtime failure - I got an error -1 during the runtime for the exact same...
Read more