I have a collection called navigationList. This list holds customer objects. A customer has a property called Town.
Say I havea table for students attending school like this: St_ID |St_Name|Class_ID|Year ------+-------+--------+----
I have this query SELECT products_list.id_cat_unique, products_categories_list.*, COUNT(products_list.id_cat_unique) as counter
Here is the my previous experiences about optimizing sql join: in MySQL, to have fast join, usually I will avoid type \'All\'. Basically, join will be faster if they have index fields in the table. E
I\'m very new to SQL so I appologize 开发者_运维知识库if this question is difficult to understand.
I am working on a Rails project that requires preferences for diferent user types depending on which shool. Thus i have these models:
I want to get results from the database which is grouped by date. The resulting touples should be grouped by date which ranges from 5 am to 5 am. In other words the cutoff should be on 5 am and not mi
I\'m having an odd proble开发者_开发问答m using itertools.groupby to group the elements of a queryset. I have a model Resource:
I was asked to do a search against our database and to explain the number of clients in the 5 different age ranges. I know I can run the same query five times.However, i was hoping to be able to creat
I have a known list of strings like the following: List<string> groupNames = new List<string>(){\"Group1\",\"Group2\",\"Group3\"};
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