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Rowgroup is another HTML attribute. [ 3 ] In reporting [ 4 ] (including business reporting , data reporting and financial reporting ), colgroups and rowgroups can be used for constructing tables and matrices which dynamically adjusts the size of their columns and rows, respectively, by displaying the set of columns in the colgroup set (which ...
[4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
A U.S. general (Dan K. McNeill) assumed command of ISAF that same month. [29] Temporary task forces include the Central Command Forward – Jordan (CF-J), which was announced in April 2013. [30] CF-J's stated purpose was to work with the Jordanian armed forces to improve the latter's capabilities. [30]
Taylor Alison Swift was born on December 13, 1989, in West Reading, Pennsylvania. [1] She is named after the singer-songwriter James Taylor. [2] [3] Her father, Scott Kingsley Swift, was a stockbroker for Merrill Lynch, and her mother, Andrea Gardner Swift (née Finlay), worked as a mutual fund marketing executive. [4]
Hồ Chí Minh agreed to talk with France but negotiations failed. After one year of low-level conflict, all-out war broke out in December 1946 between French and Việt Minh forces as Hồ Chí Minh and his government went underground. The French tried to stabilize Indochina by reorganizing it as a confederation of Associated States.
Iran, [a] [b] officially the Islamic Republic of Iran (IRI) [c] and also known as Persia, [d] is a country in West Asia.It borders Turkey to the northwest and Iraq to the west, Azerbaijan, Armenia, the Caspian Sea, and Turkmenistan to the north, Afghanistan to the east, Pakistan to the southeast, the Gulf of Oman and the Persian Gulf to the south.
This article is part of a series on the History of the United States Timeline and periods Prehistoric and Pre-Columbian Era until 1607 Colonial Era 1607–1765 1776–1789 American Revolution 1765–1783 Confederation period 1783–1788 1789–1815 Federalist Era 1788–1801 Jeffersonian Era 1801–1817 1815–1849 Era of Good Feelings 1817–1825 Jacksonian Era 1825–1849 1849–1865 Civil ...