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Jessica Qiu

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Top Stories by Jessica Qiu

Spreadsheet software is widely used by people in every industry with flexibility for data computing and analysis. But due to inherent drawbacks, common business spreadsheet software can't conduct relational query like SQL. The spreadsheet can implement the visualized calculation to some extent, and the nontechnical people can perform some rather complex calculations without having to learn the SQL. However, as the core of SQL, the relational query is unable to be implemented through common business spreadsheet software, which adds complexity to the apparently simple problems of multi-table join. For example, the Finance department needs to calculate the salary, and the relevant data is stored in ”standard sheet”, ” Absence sheet”, and ” performance sheet”, as shown in the below figure: If these three sheets can be joined, then you can compute it easily via the standard... (more)

Will Big Data Fall into the Pitfall of Failure?

Recently, I read "Why Big Data Projects Fail" by Stephen Brobst. I can’t agree more with his opinions which exposed the problem I’ve been worried about. In this article, I am going to further discuss this topic to remind the enterprises to beware of falling into such pitfall of failure. t Let’s have a look on a positive example. As a successful enterprise in leveraging big data, how does Google make use of the big data? 1. Collect the row data, capture the contents of each website, e-mail, or Cookie, and extract the key information. 2. Create the complex syndetic index for this inf... (more)

The Truth About Efficient Data Processes in Java Development

In Java development, the typical data computation problems are characterized with: Long computation procedure requiring a great deal of debugging Data may from database, or Excel/Txt Data may from multiple databases, instead of just one. Some computation goals are complex, such as relative position computation, and set-related computation Just suppose a sales department needs to make statistics on the top 3 outstanding salesmen ranking by their monthly sales in every month from Jan to the previous month, based on the order data. Java alone is difficult to handle such computations... (more)

Hadoop + esProc Help You Replace IOE

What is IOE? I=IBM, O=Oracle, and E=EMC. They represent the typical high-end database and data warehouse architecture. The high-end servers include HP, IBM, and Fujitsu, the high-end database software includes Teradata, Oracle, Greenplum; the high-end storages include EMC, Violin, and Fusion-io. In the past, such typical high performance database architecture is the preference of large and middle sized organizations. They can run stably with superior performance, and became popular when the informatization degree was not so high and the enterprise application was simple. With the ... (more)

An Alternative to Stored Procedure in Big Data Computation

As we know, the stored procedure is designed to handle computations involving complex business logics. In the past, the data structure and business logics were so simple that one SQL statement was enough to achieve user's computational goal. With the rapid growing of information industry, users frequently find that they need to achieve the increasingly complex computational goals to out-perform their competitors. To address such computations, SQL alone is far from enough. Database programmers have the additional demands regarding the judge and loop statements, branches at multip... (more)