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How to think in data stores instead of databases?
...e the sort of query that looks good on paper but is atrociously slow in an SQL database.
In terms of how to change how you represent data, the most important thing is precalculation. Instead of doing joins at query time, precalculate data and store it in the datastore wherever possible. If you want ...
With MySQL, how can I generate a column containing the record index in a table?
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@smhnaji MySQL requires that every "derived table" is given a name. I decided to call it "r" :) ... It has little purpose in this case, but you'd normally use it to reference attributes of the derived table, as if it was a real table.
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How to deploy an ASP.NET Application with zero downtime
...zero downtime on the ASP.NET app -- the question isn't "how to deploy to a sql server db with zero downtime".
– Sklivvz
Jan 20 '11 at 15:48
6
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互联网医疗新格局：顶级医生入场 - 资讯 - 清泛网 - 专注C/C++及内核技术
...、最终解决“看病难”的问题？他们的这些尝试，最终会如何改造互联网医疗的产业格局、以及中国医疗的组织形态？网易科技将继续选取其中的代表性商业模式，推出系列报道。
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“体制内医生集团”获千万级融...
ORDER BY the IN value list
I have a simple SQL query in PostgreSQL 8.3 that grabs a bunch of comments. I provide a sorted list of values to the IN construct in the WHERE clause:
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How to Join to first row
...ROM LineItems
WHERE OrderID = Orders.OrderID
)
In SQL Server 2005 and above, you could just replace INNER JOIN with CROSS APPLY:
SELECT Orders.OrderNumber, LineItems2.Quantity, LineItems2.Description
FROM Orders
CROSS APPLY
(
SELECT TOP 1 LineItems.Quan...
Relational table naming convention [closed]
...rd Filing Systems [characterised by Record IDs which are implemented in an SQL database container for convenience):
the tables are the Subjects of the database, thus they are nouns, again, singular
the relationships between the tables are the Actions that take place between the nouns, thus they ar...
How to return result of a SELECT inside a function in PostgreSQL?
I have this function in PostgreSQL, but I don't know how to return the result of the query:
2 Answers
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How to organize a node app that uses sequelize?
...rdinarily you would use select from two or more tables, or a union in pure SQL, you would have to run separate queries, and with the async nature of Node it's just added complexity.
Therefore I moved away from using Sequelize. Moreover I am switching from using ANY data fetching from DB in the mod...
Bulk insert with SQLAlchemy ORM
Is there any way to get SQLAlchemy to do a bulk insert rather than inserting each individual object. i.e.,
10 Answers
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