I have this array of hashes: - :name: Ben :age: 18 - :name: David :age: 19 - :name: Sam :age: 18 I need to group them by age, so they end up like this:
I have a sports tracker MySQL database and am trying to extract some stats; relevant tables are outlined below:
I am trying to translate a sql query in django\'s ORM. Tried to use annotate() but I don\'t manage to get same results than the sql query.
for a report I\'m trying to query events from different shifts. The shifts start on 6 am, 2 pm, and 10 pm every day, and all of the data in the table is tagged with a datetime timestamp. Previously th
MySql supports GROUP BY WITH ROLLUP which will return aggregates for the l开发者_运维技巧ast x of the n columns in the group by but does not support GROUP BY WITH CUBE to take all combinations of the
Scenario: I need to create a report for the auditors for an ASP.Net application. I have a program that parses the XML of the web.config files in a directory for the authorization tag and creates a rep
I have a client database that is in a pretty poor state, but I have to work with it. We have a set of product id\'s and each id is made up of the attributes of the product. What i\'d like to do is sel
Having a bit of trouble with getting total unique records and grouping by date. The end result is I am getting totals per day but it is not using unique emails based on the distinct function. Here is
Let\'s say I have the following table: id| letter| date -------------------------------- 1| A| 2011-01-01
UPDATE table_name SET col3 = SUM(col2) GROUP BY col1 Is giving an error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax开
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