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variable aa=null it is not to be judged. Although AA is indeed empty. Even in the selection conditions are not judged. I don't know why, I had to use NVL () This function to judge. Outside of the condition can be judged by the AA is null. Add a little to the Six. It is important to note that the parameter name cannot be the same as the database field name when you write the stored procedure. Otherwise Oracle will treat this parameter name as a field name, even if you distinguish it from the a

the learning notes, such as: Network database ASP point through, Network and mobile communication development research. For example: SELECT Learning notes from learning notes WHERE title like "%asp.net%" This query is to query all headings that contain "asp.net" learning notes. 2. Underline _: Matches a single character, commonly used to limit the length of the character of an expression. For example: SELECT Learning Notes from learning Notes table WHERE title like "V_ Development Select" This

Preface: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->After nearly N weeks of restructuring, the first version will be released. This version is absolutely lethal in terms of functionality, currently, it is difficult to find a blog that fully supports the functions supported by this blog. However, the current version of

Dear csdn users: Hello! To better serve users, csdn blog channel has released the blog migration function,Welcome to try it out first! Csdn released the blog migration function, which currently supports blog migration for the following sites:Blog Park, iteye, Sina, Sohu, Hexun, chinaunix, Netease, 51cto. com.

[Original] blog garden third-party client-I blog garden App open source,-iapp[Original] blog garden third-party client-I blog garden App Open Source Please specify the source for this reprinted article --Polobymulberry-blog 1. Preface At present, the I

Do you have a blog collection ?, Blog collection Source: http://www.ido321.com/1075.html Dear friends, now the station also has a blog collection Hello: http://www.ido321.com/daohang/ Because I usually like to include blogs, I just created a blog collection. If you like this collection and want to become one of th

Independent blog required: three PHP blog management systems. [Document of the Institute of fire station] more and more people have their own blogs. even though blogs are common today, they can apply for them in Baidu Space, Sina blog, etc., but for professional [Document of the Institute for Building fire stations]More and more people have their own blogs. Altho

I have been writing a blog for a year. My initial goal was to use it as an online notebook and extract some ofArticle, Materials, and occasionally write articles and complain, so the blog just opened and told many people my blog address. At that time, they did not know what the blog was like, it's just my personal webs

Step by step teach you how to automatically deploy a blog, step by step deploy a blogClick here to teach you how to build an automatic blog deployment step by stepHow to Use the Z-Blog system Z-Blog 1.7 User ManualSystem Configuration:Servers: Windows 2000 and IIS5.0 or above require read and write permissions for syst

Android blog writing plan and android blog writingAndroid blog writing plan Hello, everyone! Xiao Wu hasn't written a blog for a long time. Due to work reasons, he doesn't have much time to summarize his development experience. According to previous blogs, blog posts are not

Use GitHub to build a personal blog and github to build a blog 1. Establish the environment First, you need to download two things. 1. node. js 2. git You don't need to talk about the specific download. Basically, you can download the default installation. Remember the installation path first. The following window is displayed during Git installation. Select the second one. In this way, you can perform Git

Sometimes, your blog may need such a feature: In their blog on the aggregation and display of Friends blog The latest article, so convenient for their timely understanding of friends, in addition, also facilitate visitors to find and this blog related blogs and articles. This function you can call it "

In recent years the rapid development of blog, to become a blog is too easy, in the free blog site to apply for a user, write a few articles can claim that they have a blog. If you think blogging is so simple, so easy, it's wrong! If you use the Copy+paste way to go around and pick up the article to your

With the rapid development of micro-blog, micro-Bo in the strong driven microblogging marketing has become a marketing and network marketing personnel will need to learn a new knowledge, I also just contact microblogging marketing, in the ongoing exploration process summed up a number of tips, of course, I'm about to say this micro-blog marketing methods may not have been mentioned before, Or no one to shar

Blog crawl system, blog crawl Introduction Weekend nothing dry, bored, using PHP to do a blog crawl system, I often visit is cnblogs, of course, from the blog park (see I still like the blog Park) began to start, my crawl is relatively simple, get web content, and then thro

"Fire Building Station Academy document"More and more people have their own blog, although the blog is very common, casually in the Baidu Space, Sina blog and so can apply, but for professional-level bloggers, free blog has a lot of inconvenient, such as: custom code, add and modify part of the code, can not get the fu

Six months ago, I set up a personal blog, want to read and write-based, do not want to have been a few months, data construction has slowly completed, but the blog is a long-term process, not a short time can be done, and today to browse Zblog website, Discover the zblog-asp system has also updated the Z-blog 2.3 avengers version, this new version of this has bro

August 23 News, Today 14:00 Blog Network Chairman and CEO Xingdong and internet Laboratory CEO Wang Junxiu Guest, Wang Junxiu said, blog appearance changed the site's structure and mechanism, blog is the only thing that can be tied to the portal. Wang Junxiu stressed, "the blog This five years changed the content stru

Sometimes, your Blog may need the following features:Aggregates and displays the latest Blog articles on your own Blog, so that you can learn about your friends in a timely manner. In addition, it is also convenient for visitors to find Blog and articles related to this blog.This function can be called "

One of the best news in September was that AdSense finally had a Chinese Blog. I used to read AdSense's english blog website, but it was not very convenient and understandable. Now it's okay. After the Chinese Blog is published, I will be able to thoroughly study AdSense in the future. Google is very considerate of our Chinese netizens. Thanks to Google! By the