I have a sql like this: SELECT *, count(*) as cc FROM manytomany GROUP BY aid, bid ORDER BY cc DESC which return all records with the count #.
I need advises and want to share my experience about Query Optimization. This week, I found myself stuck in an interesting dilemma.
I am new to rails so sorry if sometimes I don\'t make much sense. Here is what I am trying to do. I am trying to build a vote system. So next to a blog post there is a link that says \'vote\' (will pr
I am learning SQL for a personal projects and seems that I don\'t quite get the COUNT function. I 开发者_开发问答have a \"sample\" table with this sample data:
Is there a way in MySQL to COUNT(*) from a table where if the number is greater than x, it will stop counting there? Basically, I only want开发者_如何学JAVA to know if the number of records returned f
I would really appreciate some help with my problem: I have 2 MySQL tables, categories and posts, laid out (simplified) like so:
How do you count duplicates in a ruby array? For example, if my array had three a\'s, how could I count 开发者_JAVA技巧thatAnother version of a hash with a key for each element in your array and valu
I want to fetch a set of Posts w/ vote count listed, sorted by vote count (e.g.) Post 1 - Post Body blah blah - Votes: 500
I have another post which resulted in this SELECT DISTINCT a.ArticleID, COUNT(*) AS KeywordMatch, a.Headline,
Okay so I have a database field called moderated It is an ENUM with 3 values: approved denied unmoderated
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