Tuesday, February 22, 2011

Column-oriented databases, just another post

The debate about column-oriented databases and relational databases continues. Conor Cunningham published this post recently, which is a good read.

Fight!

Monday, February 21, 2011

Getting table size per database

The script below will give a simple list of much space each object within your database uses.

I can’t remember where I got it. If you recognize it, please let know.

-- Create the temp table for further querying
CREATE TABLE #temp(
    rec_id        int IDENTITY (1, 1),
    table_name    varchar(128),
    nbr_of_rows    int,
    data_space    decimal(15,2),
    index_space    decimal(15,2),
    total_size    decimal(15,2),
    percent_of_db    decimal(15,12),
    db_size        decimal(15,2))

-- Get all tables, names, and sizes
EXEC sp_msforeachtable @command1="insert into #temp(nbr_of_rows, data_space, index_space) exec sp_mstablespace '?'",
            @command2="update #temp set table_name = '?' where rec_id = (select max(rec_id) from #temp)"

-- Set the total_size and total database size fields
UPDATE #temp
SET total_size = (data_space + index_space), db_size = (SELECT SUM(data_space + index_space) FROM #temp)

-- Set the percent of the total database size
UPDATE #temp
SET percent_of_db = (total_size/db_size) * 100

-- Get the data
SELECT *
FROM #temp
ORDER BY total_size DESC


DROP TABLE #temp