what is difference between ods and data warehouse

For example, the Add method of a user Class, returns the user object instance in case of success, returns false in case of failure and can get the reason string of failure by the GetError method .... Speaking of which, I seem to understand that the Add method should always return the user object, or throw an exception? But in that case, there's no difference in the amount of code they have. The problem is

in detail the differences between switches and hubs through theories and instances. To sum up, this article fully discusses the differences between vswitches and hubs from the outside to the inside, from the surface to the essence. In today's global network era, networks have become essential for human life. As an important device for LAN Construction: switches and hubs play a "pivot" for LAN data transmission. So

What is the difference between intent. putextra (bundle) and direct transfer with intent. putextra ("XX", YY )? Reply Guangdong-worms (346345565) 15:39:44 Let me answer this question. Reply Guangdong-worms (346345565) 15:39:54 I want to criticize you first Reply Guangdong-worms (346345565) 15:40:00 First, this is not a

= '{"prop": "Val "}';//This is how you deserialize that JSON string into an object.VaRMy_obj =JSON. parse (my_json_string); alert (my_obj.prop= 'Val ');//Alerts true, Fancy that!//And this is how you serialize an object into a JSON string.VaRMy_other_json_string = JSON. stringify (my_obj ); Also, Paul Irish pointed out to me that Douglas crockford uses the term "JSON object" in the json rfc, but in tha

str) {super . Append (str); return this ; }}2. What is StringBuffer?StringBuffer is a thread-safe variable String classJava.lang.StringBuffer inherits from Abstractstringbuilder (which is inherited from the class as well as StringBuilder, and some methods are implemented in that class), overriding most of it

buffer, which is read from this point. Count refers to the maximum number of bytes read. The write () method and read () method have the same parameter type. 2,What is the difference between memorystream. Position and memorystream. Seek? Both of them obtain or set the current position in the stream. It seems that th

encoding code groups: natural binary code group (NBC), collapsed binary code group (FBC), and gray binary code group (RBR ). International PCM standards mainly use FBC. Although the compressed PCM is lossless compression, the signal characteristics represented by typical audio signals are not optimal, and it is not well adapted to the specific requirements of the human ears auditory system. The

quasi-synchronization (plesiochronous). The Manchester code allows the receiver to easily extract the clock information from the received bitstream, making it easy to synchronize bits. In the asynchronous communication with the frame as the transmitting unit, the receiver usually uses the method of extracting the clock information from the received bit stream to realize the bit synchronization.In the character-based asynchronous communication, because each character only 8 bits, so as long as t

What is the difference between Linux 775 and 777 permissions who give an example Reply to discussion (solution) Read permission R = 4Write Permission W = 2Execute Permissions x = 1775 these three digits represent the rights of the owner, group user, and other user.For example:7 owner has read, write, execute permissions7 Groups of users have read, write, e

provide 2Gbps (256mb/s) bandwidth, ddr4-3200 that is 51.2gb/s, higher than the ddr3-1866 of more than 70%. In the process of DDR development, it has always been to increase the data prefetch value as the main performance improvement means. But in the DDR4 era, the increase in data prefetching became more difficult, so the bank group design was introduced.

This article mainly introduces the MVVM mode ViewModel and view, model what is the difference? This article explains their function and function respectively, then summarizes the difference between them, the need for friends can refer to the following Model: Very simple, is

What is the difference between Oracle functions and stored procedures1. The difference between the return value, the function has 1 return values, and the stored procedure is returned by the parameter, can have more or No 2. The differen