Consider the data mining models in the Microsoft SQL server which are implemented through extensions to the SQL database query language (e.g. predict join) (Seidman, 2001) or the proposed SQL extensions to enable decision tree classifiers (Sattler & Dunemann, 2001). OLAP cube definition is ...
In a geospatial database setting, there is an underlying road network (or spatial road network) where spatial objects are located. Therefore, the distance between two objects is a network distance which is the shortest road (or shortest path) between these objects. Fig. 2 shows the example of...
M. Egenhofer A Formal Definition of Binary Topological Relationships W. Litwin, H.-J. Schek (Eds.), Proc. Third International Conference on Foundations of Data Organization and Algorithms (FODO), Paris, France, Lecture Notes in Computer Science, 367, Springer-Verlag, New York (1989), pp. ...
this syntax may look like regular C#string interpolation, the supplied value is wrapped in aDbParameterand the generated parameter name inserted where the{0}placeholder was specified. This makesFromSqlsafe from SQL injection attacks, and sends the value efficiently and correctly to the database. ...
EclipseLink enables you to create, read, update, and delete persistent objects or data using queries in both Java EE and non-Java EE applications for both relational and nonrelational data sources.
JSON Queries in SQL with SnowflakeSnowflake supports the common standardized version of SQL (ANSI) for database querying, and aggregates unstructured, semi-structured (JSON) and structured data. Snowflake simplifies access to JSON data and allows users to combine it with structured data. Using Sn...
all database queries can be thought of as doing just this. Indeed ,we have a continuum of analysis and exploration tools with SQL queries at one end, OLAP queries in the middle, and data mining techniques at the other en 发现有用的趋向在databsets是数据采集的一个相当宽松定义: 在某种意义...
'string' does not contain a definition for 'empty' 'System.Threading.ThreadAbortException' occurred in mscorlib.dll...what is the error?how to solve??? 'System.Web.UI.WebControls.Literal' does not allow child controls. 'The input is not a valid Base-64 string' ERROR 'type' does not con...
Excel Upload helps you to upload Excel Data to the destination table in the database. You need to have the “XLUSER” function role mapped to access the Excel Upload window and retrieve mapping definition (pre-defined by XLADMIN user) to upload excel data. Excel Upload supports excel files ...
In general, the results of a QuerySet aren’t fetched from the database until you “ask” for them. When you do, the QuerySet is evaluated by accessing the database. For more details on exactly when evaluation takes place, see When QuerySets are evaluated. Retrieving a single object ...