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kelvinjpeak
Starting Member
4 Posts |
 Posted - 2015-01-13 : 13:46:22
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| Do Anyone know how to choose the maximum value after group by?For example, i grouped-by a relation like this:SELECT ENUM,COUNT(PCODE) as OnProjectsFROM employee-projectGROUP BY ENUM; |
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webfred
Master Smack Fu Yak Hacker
8781 Posts |
Posted - 2015-01-13 : 13:47:32
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max()?
Too old to Rock'n'Roll too young to die. |
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kelvinjpeak
Starting Member
4 Posts |
Posted - 2015-01-13 : 13:50:54
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Yes, i do know that but i dont know how to add on it. Sorry, i am kind of new LOLquote:
Originally posted by webfred
max()?
Too old to Rock'n'Roll too young to die.
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tkizer
Almighty SQL Goddess
38200 Posts |
Posted - 2015-01-13 : 13:53:45
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| You haven't provided enough info, but here's my shot:SELECT MAX(OnProjects) FROM (SELECT ENUM,COUNT(PCODE) as OnProjectsFROM employee-projectGROUP BY ENUM) t;Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/ |
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kelvinjpeak
Starting Member
4 Posts |
Posted - 2015-01-13 : 13:56:43
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THX A LOT!But could i use the LITMIT 1 statement to show the max value?quote:
Originally posted by tkizer
You haven't provided enough info, but here's my shot:SELECT MAX(OnProjects) FROM (SELECT ENUM,COUNT(PCODE) as OnProjectsFROM employee-projectGROUP BY ENUM) t;Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/
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tkizer
Almighty SQL Goddess
38200 Posts |
Posted - 2015-01-13 : 14:00:06
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| LIMIT is a MySql function. SQLTeam.com is for Microsoft SQL Server. Similar syntax, but there are times like now that they aren't the same.Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/ |
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kelvinjpeak
Starting Member
4 Posts |
Posted - 2015-01-13 : 14:04:02
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Oh i got it,BTW, what is the 't;' refer to ?HAHA i should google it but i just want to ask it if you r willing to answer quote:
Originally posted by tkizer
LIMIT is a MySql function. SQLTeam.com is for Microsoft SQL Server. Similar syntax, but there are times like now that they aren't the same.Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/
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tkizer
Almighty SQL Goddess
38200 Posts |
Posted - 2015-01-13 : 14:11:07
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| It's the alias for the derived table. An alias is required. I typically just use t. You can name it whatever you want.Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/ |
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how to choose the maximum value after group by?