Geeks With Blogs
ken spencer August 2011 Entries
tsql: Counting unique elements in a sql server table
Today I wanted to count each unique element in a SQL Server table to make sure they were unique. Took a bit of playing but this finally works great: SELECT DISTINCT t.columntocheck, (Select COUNT(columntocheck) from tabletoserach where columntocheck = t.columntocheck) as countof FROM tabletoserach t This gives me back a list of all unique items in columntocheck and also counts the number of them. Of course, theres no where clause on this so be careful if you have a huge table. Mine was really small, ......

Posted On Tuesday, August 9, 2011 10:04 AM

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