I have a situation where I need to match an objects to multiple tags simultaneously so that results set is \"narrowed down\" to match all tags. I\'ve found the following MySQL query for this:
I think t开发者_StackOverflowhis is the best solution.However, this query is not solve my issue - I have like this table:
I got a table like this: IdDate1Date2Status ---------------------------------------------- 101/01/2010nullA
Hey, I\'m not the biggest expert with MySQL but here is what I have so far to get the MAX entery SELECT DISTINCT
I know that if you have one aggregate function in a SELECT statement, then all the other values in the statement must be either aggregate functions, or listed in a GROUP BY clause. I don\'t understand
I search on SO many topics like this, but I can\'t apply to my query. This is : SELECT forum_categories.title, COUNT(DISTINCT forum_topics.id) AS total_topics,
I\'m trying to figure out how to GROUP BY on multiple columns开发者_开发知识库. I want to group items when the SSN or the address matches. For example, here are three records:
I have a mysql database with very large tables. I often run queries that involve aggregate functions. Queries开发者_如何学Go with the aggregate functions like MIN, MAX, SUM, COUNT are running very slo
I have a list of rows, and I\'d like to SUM the number of the lines when grouping (a sort of COUN开发者_如何学JAVAT) but only when, for each row, the field customField=0.
I have this table : forum_categories id title forum_topics id category_id (n-1 with forum_categories.id) forum_messages
加载中,请稍侯......