15

For me, it's CTE's. I find it amazing to complete a calculation with clear intermediate steps, and goes a long way towards convincing people to use SQL rather than Excel to perform calculations on large tables of data.

What construct do you like using on a daily basis?

you are viewing a single comment's thread
view the rest of the comments
[-] itty53@vlemmy.net 2 points 1 year ago* (last edited 1 year ago)

You can create a functional enum view by just assigning enums as the column names and storing a single row of the int (or whatever enum) representation.

Then use that view in a cross join. You can (almost) eliminate magic numbers entirely and makes the code much more human legible.

Example

CREATE VIEW AS const.OrderType
SELECT 
CAST (1 as 'New'),
CAST (2 as 'Pending'),
CAST (3 as 'Shipped')
GO

-- Assuming a table with OrderId and OrderTypeId

SELECT         o.OrderId 
FROM           dbo.Orders AS o
CROSS JOIN const.OrderType AS ot
WHERE         o.OrderTypeId = ot.[Pending]

-- Only returns orders where TypeId = 2
this post was submitted on 12 Jun 2023
15 points (100.0% liked)

Programming

13269 readers
11 users here now

All things programming and coding related. Subcommunity of Technology.


This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 1 year ago
MODERATORS