In R, how can one find the Max of a variable on one table based on multiple criteria from another table

In R, how can one find the Max of a variable on one table based on
multiple criteria from another table



1.merge - In R, how can one find the Max of a variable on ...

Description:... how can one find the Max of a variable on one table based
on ... in multiple columns based on criteria? ... of one variable (sales)
in respect to another ...



2.Frequencies and Crosstabs - Quick-R: Home Page

Description:table( ) can also generate ... let's assume we have a 3-way
contingency table based on ... Use bar and pie charts for visualizing
frequencies in one ...



3.Calculate multiple results by using a data table - Excel ...

Description:A data table is a range of cells that shows how changing one
or two variables in your formulas (formula: A sequence of values, cell
references, names, functions, or ...



4.Should I use a #temp table or a @table variable?

Description:You cannot explicitly add an index to a table variable,
however you can ... What the optimizer does with them is another story.
<G> One thing ... you will find that ...



5.DECLARE @local_variable (Transact-SQL)

Description:Only one identity column can be created per table. ... A table
can have multiple ... The following example uses a local variable named
@find to retrieve contact ...



6.SQL SERVER – Difference TempTable and Table Variable ...

Description:15-12-2009 · ... data gives result with max speed . table
variable only ... to a table variable can be ... that one row is returned
from a table variable.



7.Table Variables In T-SQL - OdeToCode

Description:... because you can't pass a table variable to another ...
variable as the return value of a UDF is one of ... find yourself using a
temporary table, ...



8.UPDATE

Description:Specifies one or more table hints that are allowed ...
Specifies the condition on which the join is based. The condition can
specify any ... A table variable, ...



9.Temporary Tables vs. Table Variables and Their Effect on ...

Description:28-05-2007 · For SQL 2000, if you compare query plans, you'll
notice that when a table variable is involved the optimizer will not use
parallelism (visually indicated ...



10.SQL - SIR

Description:If variables are selected from a single record or table, one
output row is written ... to another record (or table) ... You can specify
multiple options on a single ...