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  2. Star schema - Wikipedia

    en.wikipedia.org/wiki/Star_schema

    Snapshot fact tables record facts at a given point in time (e.g., account details at month end) Accumulating snapshot tables record aggregate facts at a given point in time (e.g., total month-to-date sales for a product) Fact tables are generally assigned a surrogate key to ensure each row can be uniquely identified. This key is a simple ...

  3. Telecommunication transaction processing systems - Wikipedia

    en.wikipedia.org/wiki/Telecommunication...

    Some TPS providers have the ability of integrating with Microsoft Excel, giving information to the user in a spreadsheet, from where Excel Pivoting can be used to summarize and present the data. Most BI-Tools have functionality to schedule reports which can send reports via e-mail or even SMS to configured users, ensuring timely availability of ...

  4. Ignition SCADA - Wikipedia

    en.wikipedia.org/wiki/Ignition_SCADA

    It is configured by defining an Ignition SQL database connection, then enabling the feature on a per tag basis. The system automatically creates and manages the tables without any user SQL input. Historical Scan Classes support different logging intervals by sets of tags as well as altering the logging rate dynamically. This allows the system ...

  5. SQL syntax - Wikipedia

    en.wikipedia.org/wiki/SQL_syntax

    Title Authors ----- ----- SQL Examples and Guide 4 The Joy of SQL 1 An Introduction to SQL 2 Pitfalls of SQL 1 Under the precondition that isbn is the only common column name of the two tables and that a column named title only exists in the Book table, one could re-write the query above in the following form:

  6. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    A pivot table is a table of values which are aggregations of groups of individual values from a more extensive table (such as from a database, spreadsheet, or business intelligence program) within one or more discrete categories. The aggregations or summaries of the groups of the individual terms might include sums, averages, counts, or other ...

  7. Select (SQL) - Wikipedia

    en.wikipedia.org/wiki/Select_(SQL)

    Title Authors ----- ----- SQL Examples and Guide 4 The Joy of SQL 1 An Introduction to SQL 2 Pitfalls of SQL 1 Under the precondition that isbn is the only common column name of the two tables and that a column named title only exists in the Book table, one could re-write the query above in the following form:

  8. SQL:2011 - Wikipedia

    en.wikipedia.org/wiki/SQL:2011

    SQL:2011 or ISO/IEC 9075:2011 (under the general title "Information technology – Database languages – SQL") is the seventh revision of the ISO (1987) and ANSI (1986) standard for the SQL database query language. It was formally adopted in December 2011. [1] The standard consists of 9 parts which are described in detail in SQL.

  9. Frequency (statistics) - Wikipedia

    en.wikipedia.org/wiki/Frequency_(statistics)

    Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and in this way, the table summarizes the distribution of values in the sample. This is an example of a univariate (=single variable) frequency table. The frequency of each response to a survey question is depicted.