CREATE TRIGGER Tr_borrow on borrowAfter INSERTAsIF ((select I.bno from INSERTED I) in (select BNO from BOOKS WHERE bname= ' b002 '))BEGININSERT Borrow_saveSELECT * from INSERTED IPRINT ' has backed up this record 'ENDELSEBEGINPRINT ' did not back up this record 'ENDSQL Written question: Create a trigger on the borrow table to complete the following functions: If the reader borrows the title "b002", the reader's borrowing record is saved in the Borrow_
Internship environment:
Windows XP + VC 6.0
Internship objectives:
Create a console process in Windows XP, which should contain n threads. Use the n threads to represent n readers or writers. Each thread performs read/write operations according to the requirements of the corresponding test data file (described later. The semaphore mechanism is used to implement reader-first and writer-first issues respectively.
Restrictions on
The corresponding module is provided for each suffix nuke. In order to decide which version of reader or writer module to use, Nuke will parse the file suffix first and then call the relevant module based on this.Take JPG as an example:The file format has two suffix names:. jpg and. jpeg. In fact, the two suffix names are solved by using the same module. Use TCL script to solve this problem in nuke. Nuke file path has such a file: JPEGREADER.TCL, the
pure byte stream retained in the memory, you can use xmltextreader to analyze the word throttling as XML. This memory stream has no specific encoding. In this example, create an xmltextreader to analyze the stream and display the obtained XML.
Stringreader stream; xmltextreader reader = NULL; try {console. writeline ("Initializing stringreader..."); stream = new stringreader ("Dim stream as stringreader dim
/*author:jiangong sun*/As I ' ve manipulated a lot of data using SQL data reader in recent project. And people says it ' s not good to access the data by column name.So I ' ve made a performance test in reading data from SQL data reader.Firstly, I ' ve created a table with different data types, like int, varchar, date time etc.CREATE TABLE userinformation (Id BIGINT, FirstName NVARCHAR (255), LastName NVARCHAR (255), Validdate DATETIME, Identification
Google Reader is a feed aggregator built using a large amount of JavaScript. It can capture the latest feed data in a very timely manner. The data called by Google's Ajax front-end adopts the atom format. This data technology reduces the development difficulty of Google Reader and makes it easy for third-party applications to expand it.
Get feed
/Reader/ato
[CNNVD] Adobe Reader and Acrobat Memory Corruption Vulnerability (cnnvd-201308-479)Adobe Reader and acrobat are all products of the United States Adobe (Adobe) company. Adobe Reader is a free PDF file reader, and Acrobat is a PDF file editing and Conversion tool.There are security vulnerabilities in Adobe
Adobe Reader is one of our most common electronic document reading tools, mainly for reading PDF documents. But it is well known that it starts too slowly. However, if I tell you that opening Adobe Reader can be as fast as opening word, you won't believe it. Let's take a look at the way to speed up Adobe Reader, believe it or not, it's not up to you!
Why not acr
Traverse Records in a data readerWhen the ExecuteReader method returns a DataReader object, the position of the current cursor precedes the first record .The Read method of the reader must be called to move the cursor to the first record, and then the first record becomes the current record.If the data reader contains more than one record, the Read method returns a Boolean value of true.To move to the next
Reader domain:
If you want to restrict access to a specific document created by a form, add a "Reader" field to the form. The "Reader" field clearly lists users who can read the documents created in this form. For example, if you restrict the personnel files of an employee to only members of the "Human Resources" department, the employee himself or herself, and t
PDF is an electronic file format developed by Adobe, where many e-books, product descriptions, and corporate documents are made into PDF files in everyday office. Because our operating system does not support the open PDF file by default, it becomes a question for many users how to open the PDF file. In fact, as long as a good PDF reader installed on our computer, you can easily read the contents of the PDF file. In addition, the use of mobile phones
As with the producer consumer Problem of the second multi-threaded tenth producer Consumer problem , reader writer is also a very famous synchronization problem. The reader writer's question description is very simple, there is a writer many readers, multiple readers can read the file at the same time, but the writer does not allow readers to write the file, the reader
Philosophers dining problems are very useful in modeling processes such as competition for mutually exclusive access to limited resources (such as I/O devices. Another famous issue is the reader-writer issue (Courtois ).Et al., 1971). It creates a model for database access. For example, imagine an airplane ticket booking system in which many competing processes attempt to read and write data. Multiple processes can read the database at the same timeBu
If you only want to read data without updating the data, you do not have to store it in the dataset. On the contrary, data can be read directly from the database and the application can be read.In this case, you can use a data reader to simplify the code.
If the program needs to perform continuous read-only transfer through the query results, you can use the data reader object instead of filling the dataset
We use events and a variable that records the number of readers to solve reader-writer problems in the second-to-last multi-threaded 11th article Reader-writer question. The problem has been solved, but the code is a bit complicated. This article will introduce a new method-read-write lock srwlock to solve this problem. read-write locks also distinguish between the thread that wants to read the resource val
rss| Quick Start
The RSS reader is a simple and easy-to-use RSS reader for the information age to get the information you need as soon as possible. It allows you to manage, retrieve, and read information in a format. Managing information is that you can identify and manage information sources according to your needs, and access information is that you can update your information from a customized source of
requirements to meet the time of production, which for critical resources access will produce a certain sequence, Will increase the read speed of resources within the system. consumers point to a location where there are valid data, the producer points to the location is not valid data, and the pipe ring buffer similar to the pipe of the ring buffer to take a look at understanding it. in this picture, you can think of write as a producer, in the production of data, read can be seen as a consume
Adobe Acrobat Reader DC, formerly known as Adobe Reader, is a free pdf reader from Adobe that can view, print, and manage PDF documents and interact with all PDF documents including forms and multimedia content.PC version:Ftp://ftp.adobe.com/pub/adobe/reader/win/AcrobatDC/1500720033/AcroRdrDC1500720033_zh_CN.exe (Engli
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