Mondrian MDX简介 MDX(Multidimensional Expression)是构建查询OLAP数据库的语言;就像SQL是构建操作关系型数据库语言一样。 MDX是微软首创,作为1997年制度OLE DB for OLAP (ODBO)的一部分;Mosha Pasumansky 是MDX语言设计者之一;MDX很快即被其他OLAP厂商
Mondrian MDX简介
MDX(Multidimensional Expression)是构建查询OLAP数据库的语言;就像SQL是构建操作关系型数据库语言一样。
MDX是微软首创,作为1997年制度OLE DB for OLAP (ODBO)的一部分;Mosha Pasumansky 是MDX语言设计者之一;MDX很快即被其他OLAP厂商作为OLAP查询语言标准实现,也包括Mondrian。
使用MDX可以查询联机分析处理(OLAP)数据,计算处理数据,检索元数据属性等。
select {[Measures].[Unit Sales]} ON COLUMNS,
{[Product].[All Products]} ON ROWS
from [Sales]
where [Time].[1997]
查询”Sales”立方体数据库”Unit Sales”维度值,针对发生在1997年度的所有产品,我们可以通过Foodmart示例数据测试。
Mondrian已经实现很多微软的分析服务标准MDX表达式,可以获得更多的内容在这里。
输入MDX查询在JPivot JSP页面有两种方式:
· 输入 jp:mondrianQuery 标签
· 在 MDX 编辑器中输入MDX语句
使用MDX 编辑器:
· 启动 Mondrian OLAP 服务
· 浏览示例 JSP 文件, for example "JPiv【本文来自鸿网互联 (http://www.68idc.cn)】ot pivottable"
· 在页面上方工具栏上点击 MDX 按钮,即显示MDX 编辑器
· 在这里输入前面示例MDX查询语句,点击Apply按钮
及显示下面的结果表格内容:

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Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

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