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  2. Data cleansing - Wikipedia

    en.wikipedia.org/wiki/Data_cleansing

    Mandatory Constraints: Certain columns cannot be empty. Unique Constraints: A field, or a combination of fields, must be unique across a dataset. For example, no two persons can have the same social security number. Set-Membership constraints: The values for a column come from a set of discrete values or codes. For example, a person's sex may ...

  3. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    Subsets of data can be selected by column name, index, or Boolean expressions. For example, df[df['col1'] > 5] will return all rows in the DataFrame df for which the value of the column col1 exceeds 5. [4]: 126–128 Data can be grouped together by a column value, as in df['col1'].groupby(df['col2']), or by a function which is applied to the index.

  4. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    Column labels are used to apply a filter to one or more columns that have to be shown in the pivot table. For instance if the "Salesperson" field is dragged to this area, then the table constructed will have values from the column "Sales Person", i.e., one will have a number of columns equal to the number of "Salesperson". There will also be ...

  5. After a long lull, Covid-19 levels are surging in the US - AOL

    www.aol.com/long-lull-covid-19-levels-113003941.html

    After a relatively slow start to the respiratory virus season, Covid-19 levels in the United States began ramping up just ahead of the winter holidays.

  6. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  7. Fantasy football waiver wire: 6 players to add for NFL Week 16

    www.aol.com/fantasy-football-waiver-wire-6...

    But if you lost one of those key performers (and you can still make roster moves), then the waiver wire may be a place to find some solace. And maybe even an emergency Week 16 starter.

  8. Nikki Glaser Postponed 'Really Invasive' Plastic Surgery ...

    www.aol.com/nikki-glaser-postponed-really...

    “So, for January 2025, I was going to possibly have, like, a brow lift or some kind of really invasive surgery that I've been, you know, looking into getting,” Glaser said during the broadcast.

  9. Table (database) - Wikipedia

    en.wikipedia.org/wiki/Table_(database)

    In a database, a table is a collection of related data organized in table format; consisting of columns and rows.. In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]