原创 Oracle Tip: Understand how NULLs affect IN and EXISTS
By Guest Contributor August 22, 2004, 5:36pm PDT On the surface, it may appear that the SQL clauses IN and EXISTS
2020-06-10 07:29:20
原创 Installing MySQL from a tarball
Installing MySQL from a tarball Installing MySQL from a tarball should be straightforward but there are several steps,
2020-06-10 07:29:20
原创 How Do I Enable Remote Access To MySQL Database Server?
By default remote access to MySQL database server is disabled for security reasons. However, some time you need to prov
2018-08-30 10:38:07
原创 JBoss start
start JBoss with a pure JRE installation 如果只安裝了jre6，運行run.bat啓動jboss的時候會看到如下錯誤：
2018-08-30 10:38:07
原创 pgAdmin
1.如果postgresql安裝的是9.0或以上版本，pgAdmin必須安裝1.12版本或以上，否則報錯如下： ERROR: column "datconfig" does not exist LINE 1: ...b.dattab
2018-08-30 10:38:06
原创 webdriver selenium xpath
xpath 語法 / 表示從根節點開始查找//表示全文查找不填表示從當前節點查找@表示attribute, By.xpath("//iframe[@class='g-editor-iframe']" ref. xpath http:/
2018-08-30 10:38:05