Coming from mostly a Linux/MySQL background, I've had reason to use MSSQL for the last few years. It's really solid, and seems to optimize queries well, which is good, because there's a few things that I still find really annoying, such as no GROUP_CONCAT. There is a more general method to do the same thing, but wow is that method cumbersome in comparison (although undoubtedly more powerful).
There are a few obvious cases which don't work (e.g. scalar UDFs aren't inlined - always use table UDFs), but the performance battle Oracle and Microsoft had circa 2000 really shows. The vast majority of the time you can code your intent and the query optimizer will simply do the right thing.
The main reason I would choose SQL over any of the competition is DataDude/VSSQL. We started using it where I work (~5100 schema objects) and it's revolutionary. T-SQL becomes a first-class language in Visual Studio:
- Full editor integration: intellisense and errors as you type.
- Build system: build (including static analysis) and deploy from Visual Studio. MSBuild-based integration for CI.
- Schema delta: you write/update your schema as though you are writing it for the first time and, as part of the build, the ALTER script will be generated for you. You rarely have to write migration scripts yourself (I've only had to when migrating data across columns/tables).
I have been thinking about solving this for PostgreSQL because I'm now completely unable to work without it - I just wish I had the time. Any other form of SQL development now feels like VBScript development in Notepad.
Links to more information about this? I've found some information about VSDBPro but it all is dated 2008. I like the sounds of this, but it seems dated...
Update: Seems like this has become SQL Server Data Tools (but not the BI tools of the same name?). I'll have to look into this more.
As far as I remember it has only ever been optional in VS2010. It was introduced by default in 2013 (.dbproj) and then reworked in 2015 (.sqlproj). All you need to get this going is: Visual Studio > File > New > Project > Other Languages > SQL Server.
You can also get it to reverse-engineer an existing database into a project[2].
Getting it to work for CI isn't turn-key. When you build a SQL/DB project it results in both a CREATE/ALTER script (depending on whether you do a diff build or a CREATE build) as well as a schema file (.dbschema). You need to track previous versions of the dbschema yourself (we use branching to track this file across releases), so that it can it has the base for diffing during the build.
It's a good idea to add a database reference to [sys] and [master] in all your projects (which is not done by default).
Knowing the right keywords I Googled a bit for you:
This is also my big complaint when it comes to MS SQL -- there has been precious little development on their SQL language. It's almost like they're in a complete feature-freeze when it comes to the SQL language.
MS SQL is missing some very basic SQL functionality.
Microsoft rewrote the code so there was no more Sybase code, but it still followed Transact SQL standards. T-SQL is not as complete as PL/SQL and others. It is just that Microsoft is that 800 pound gorilla so people use their products.
My last job I did migration from Excel and MS-Access to SQL Server using VB 6.0 code and ADO recordsets to copy and sync up data. They key was to use a column named date modified that had a time stamp when it was last modified to figure out which record was the newest and back up the old record to a history table in case it needed to be reverted later on.
Oracle IS the gorilla, but with their recent pricing/licensing moves, more large orgs are exploring moving to SQL Server, especially ones that are already a Microsoft shop. My company is doing just that.
Date handling, simple things like postgres date_trunc('month', now()) and especially looping over records in stored procedures without using cursors (that are prone to crashes).
I work with both on a daily basis and there is a mile of difference. Yes I can accomplish whatever I want in sql server but there are so many small things that could improve.
Some of other pet peevees are:
You can't use a lot of left joins, it slows down the query dramatically. If there is only one to one relation, use subselects instead.
Thou shall not do queries like this: select foo into baz from bar where fooid not in (select fooid from bar)
They are the death of the engine.
SELECT DATEPART(month,GETUTCDATE()) ? Either you are using a very old version or not using SQL Server at all cause I pretty much do everything you are complaining about on a daily basis and on a very large set of data.
Your query only extracts the month integer from a date, it does not floor it to the month. The equivalent for sql server is this ugly thing: select dateadd(month,datediff(month,0,getdate()),0)
We are on SQL server 2014. I have had a query go from 2-3 hours down to 7 minutes by replacing left joins with subselects within the query for instance (and yes all the indices are in place as recommended by sql server query planer)
The one with a insert based on a query on the same table I have never managed to run at all and I have to use a temporary table as an intermediary instead.
I have seen Sql server query planer do stupid shit too. Almost always Statistics where to blame. Are you sure those where up to date? For some reason the "auto update statistics" functionality doesn't seem to work reliably, you have to update them in a maintenance job to fix this.
There's not really a standard anymore for UPSERT to be added to. SQL has fragmented and since the last few iterations of the standard allowed for "additional non standard features", adding an UPSERT is perfectly compliant with the SQL standards.
And it's very useful in a ton of situations which is why so many other SQL dialects have added it. It's not like SQL Server is completely standards compliant so I'd rather have the functionality then have to use MERGE because it's "standard".
Agreed on GROUP_CONCAT. MSSQL has been missing that for a long time and it is a very reasonable and handy function to have.
It sounds like you are talking about the XML conversion method for concatenating groups. There is one other way around it using custom .NET CLR functions, but it is definitely cumbersome as well.
Yes, I'm referring to the XML conversion method. I'm aware you can register your own .NET CLR functions, but truth be told, it's a database for our POS application (which we purchased from a vendor), so I try to mess with the database as little as possible beyond reading the data through our own internal application so we can do useful things with it. I try to stay away from messing with the schema or even providing extra routines (I can't be sure anything would survive upgrades, which are regular and I don't want to deal with that).
