A Tcl extension which provides operators from Relational Algebra and works with Metakit data files:

• http://www.equi4.com/vlerq.org/

See also:

• Relational Algebra for Tcl http://www.equi4.com/ratcl/index
• Introduction to Ratcl http://www.equi4.com/vlerq/raintro.html
• Paper [1], presented at the Thirteenth Annual Tcl/Tk Conference
• Pivot tables (also called "cross tabulation") [2]
• Wrapping sqlite and oratcl query result sets [3]
• Ratcl API overview with examples http://www.equi4.com/pub/vq/exra/
• Ratcl-like API with sqlite backend

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RLH This is very cool stuff!

2007-Feb-16: There is a starkit which runs on Windows, Linux, and Mac OS X at [4]. The ChangeLog for this starkit is at [5].

This starkit includes the "Ratk" graphical view browser by Brian Theado. Here is an example with a pivot table (also called a crosstab, see also crosstab a la Relations):

More information about this can be found on the Vlerq discussion wiki at [6].

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