What Does Distinct Mean In Sql. I did a test on MS SQL 2005 using the following tables. SQL SELECT DISTINCT and GROUP BY both produce duplicates.
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I did a test on MS SQL 2005 using the following tables. SQL SELECT DISTINCT and GROUP BY both produce duplicates. The estimated query plan indicated that the basic inner join would be 3 times slower than the nested sub-queries however when actually running the query the basic inner join was twice as fast as the nested queries The basic inner join took 297ms on very minimal server hardware.
A 400K rows B 26K rows and C 450 rows.
SQL Query - Distinct on One Column for Distinct Value of Other with INNER JOIN Hot Network Questions Missed apple pruning window Would the median household income in the USA be 140K and mean net worth 800K if wealth were evenly distributed How to replace certain backup files on a. The estimated query plan indicated that the basic inner join would be 3 times slower than the nested sub-queries however when actually running the query the basic inner join was twice as fast as the nested queries The basic inner join took 297ms on very minimal server hardware. A 400K rows B 26K rows and C 450 rows. SQL SELECT DISTINCT and GROUP BY both produce duplicates.
