Tomas Greif

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Tomas Greif has asked 68 questions and find answers to 34 problems.

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Tomas Greif questions

Stretch time series efficiently in SQL
Return name of data frame from function
Identify Inf in sqldf
Pass arguments to function using ellipsis and set default for some if not existing
Access PostGIS from R on Windows XP
PostgreSQL CAST(x AS typename) or x::typename
Improve performance of custom aggregate function in PostgreSQL
Convert escaped Unicode character back to actual character in PostgreSQL
Filter data frame based on multiple conditions in another data frame
Generate series of dates - using date type as input

Tomas Greif answers

How to distinguish photo from picture?
Dynamic SQL Query in R (WHERE)
Group by floating date range
Select data for 15 minute windows - PostgreSQL
Postgresql k-nearest neighbor (KNN) on multidimensional cube
Calculating the Weighted Average Cost of products stock
postgres random using setseed
Typo in `dplyr::percent_rank`?
How to create a database that shows a calendar of availability for a set of apartments?
OLAP - Calculate run-off triangles, sample data and cube included (PostgreSQL/Mondrian)