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Select Distinct SQL

In a table, some of the columns may contain duplicate values. This is not a problem, however, sometimes you will want to list only the different (distinct) values in a table. The DISTINCT keyword can be used to return only distinct (different) values. SQL SELECT DISTINCT Syntax: SELECT DISTINCT column_name(s) FROM table_name
Posted by stephenw on 8/24/2009
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The SQL SELECT DISTINCT Statement ... SQL SELECT DISTINCT Syntax ... SQL HOME; SQL Intro; SQL Syntax; SQL Select; SQL Distinct; SQL Where; SQL And & Or; SQL Order By; SQL Insert; SQL Update; SQL Delete;
www.w3schools.com/SQl/sql_distinct.asp www.w3schools.com/SQl/sql_distinct.asp
The SQL SELECT Statement ... SQL SELECT Syntax ... SQL HOME; SQL Intro; SQL Syntax; SQL Select; SQL Distinct; SQL Where; SQL And & Or; SQL Order By; SQL Insert; SQL Update; SQL Delete;
www.w3schools.com/sql/sql_select.asp www.w3schools.com/sql/sql_select.asp
There is an understanding in the database world that using a 'SELECT DISTINCT' SQL query is not a good idea, because it is essentially getting duplicate rows out of the database and then discarding them. Usually it's better to rearrange the 'WHERE' clause in the query to only get the rows you need. ... SELECT u.user_id,
www.databasejournal.com/features/postgresql/article.php... www.databasejournal.com/features/postgresql/article.php/3437821/SELECT-DISTINCT-A-SQL-Case-Study.htm
Eliminate Duplicates with SQL SELECT DISTINCT: When you are working with the SQL SELECT statement, you will more than likely come across duplicate rows when viewing your query results. ... The results of running the SQL SELECT DISTINCT statement...
www.databasedev.co.uk/eliminate_duplicates.html
SQL DISTICT clause. How to use SQL DISTINCT. ... The SQL DISTINCT command used along with the SELECT keyword retrieves only unique data entries depending on the column list you have specified after it. To illustrate the usage of the DISTINCT keyword, we’ll use our Users table introduced in the previous chapters.
www.sql-tutorial.com/sql-distinct-sql-tutorial/ www.sql-tutorial.com/sql-distinct-sql-tutorial/
all groups > sql server (alternate) > may 2004 > ... I don't know what the correct syntax is to do what I want with the DISTINCT function (if it's actually possible). I have a query which displays a variety of fields from a variety of tables; (pretty standard). ... here is a some example: SELECT a.user_id,
www.developmentnow.com/g/95_2004_5_0_0_378543/SELECT-DI... www.developmentnow.com/g/95_2004_5_0_0_378543/SELECT-DISTINCT.htm
I realise I could remove the TopCategory from the statement and that makes my DISTINCT work as I wanted, but Id prefer to have the TopCategory as it saves me later having to another SQL query (Im already doing one to allow me not to list category in the Statement ....
www.developmentnow.com/g/95_2004_5_0_0_378566/SELECT-DI... www.developmentnow.com/g/95_2004_5_0_0_378566/SELECT-DISTINCT-with-JOIN.htm
Home > Forums > Engineering Computer Programs > General Engineering Programs > SQL Forum ... How do I select distinct clientID so that the one selected has the max date? that is, I need the result: 10001,2,5/22/2001; 10002,3,5/25/2001 etc; Many thanks;
www.eng-tips.com/gviewthread.cfm/lev2/22/lev3/70/pid/52... www.eng-tips.com/gviewthread.cfm/lev2/22/lev3/70/pid/526/qid/7315
Microsoft Access Database, SQL Query Syntax ... I have left out quite a few values from the select part of the statement, but I have included all of the GROUP BY statment. What does the SELECT DISTINCT do? And why are their FIRST tages before the values? Lastly why is the query GROUPING BY so many values?
www.experts-exchange.com/Microsoft/Development/MS_Acces... www.experts-exchange.com/Microsoft/Development/MS_Access/Q_22838064.html
Oracle Database, SQL Query Syntax ... MS SQL Server ... select file_id, min(location_id) location_id, entity_id, template_id from file_location where entity_id = 1025 group by file_id, entity_id, template_id...
www.experts-exchange.com/Database/Oracle/Q_23346919.htm... www.experts-exchange.com/Database/Oracle/Q_23346919.html
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Definition of
Select
-v.t., v.i.
to choose.
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Distinct
-adj.
different in nature or quality.
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SQL
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