List columns with indexes in PostgreSQL
I would like to get the columns that an index is on in PostgreSQL. In MySQL you can use SHOW INDEXES FOR table and look at the Column_name column. mysql> show indexes from foos; +-------+------------+---------------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation
postgresql - How to specify a tab in a postgres front-end COPY - Stack Overflow
I would like to use the psql "\copy" command to pull data from a tab-delimited file into Postgres. I'm using this command: \copy cm_state from 'state.data' with delimiter '\t' null as ; But I'm getting this warning (the table actually loads fine): WARNING: nonstandard use of escape in a string literal LINE 1: COPY cm_state FROM STDIN DELIMITER '\t' NULL AS ';' HINT: Use the escape string syntax fo
PostgreSQL: format interval as minutes
When I subtract timestamps, the interval is in form DD:HH:MM:SS. How can I convert it all to minutes without extracting days and hours and multiplication/addition? I'm looking for a single function which I can substitute for date_part in this query so that it returns 65: select date_part('minutes', '65 minutes'::interval); Context: I need to know how many minutes have passed since given timestamp.
Local time zone offset in PostgreSQL
My web app stores all timestamps in UTC without time zones. I have a shell/psql script that returns a list of recent logins, and I want that script to display login times in the server's local time zone (which may vary depending on where the server is and with daylight savings). To get an interval representing the difference between my database server's time zone and UTC, I'm currently using this
Python MySQL wrong architecture error
I've been at this for some time and read many sites on the subject. suspect I have junk lying about causing this problem. But where? This is the error when I import MySQLdb in python: >>> import MySQLdb /Library/Python/2.6/site-packages/MySQL_python-1.2.3c1-py2.6-macosx-10.6-universal.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /Library/Python/2.6/site-packages/MySQL_pyth
Gantt charts with R
There are now a few elegant ways to generate a Gantt chart in R. Using Candela library(candela) data <- list( list(name='Do this', level=1, start=0, end=5), list(name='This part 1', level=2, start=0, end=3), list(name='This part 2', level=2, start=3, end=5), list(name='Then that', level=1, start=5, end=15), list(name='That part 1', level=2, start=5, end=10), list(name='That part 2', level=2, start
Graphviz, changing the size of edge
I wanted to supplement shuvalov's answer. penwidth is indeed the correct command. Additionally, in shuvalov's answer penwidth is both a node and an edge property--also correct. The distinction i wanted to make: penwidth, when used as a node property (e.g., "NodeA" [penwidth = 5]) affects the border line weight for that node penwidth, when used as a edge property affects the line weight of the edge
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