Programming on Andy M Mallon - AM²

Migrating my Stack Overflow answers to blog posts (Sorry for the spam)

Mon, 11 Nov 2024 17:21:05 -0500

For a while, I have been thinking about using my Stack Overflow answers (and answers on other sites on the Stack Exchange Network), and storing a copy of them here, on my blog as well. All posts on the Stack Exchange network are covered under the Creative Commons BY-SA license. When Stack Overflow was created, this license was chosen to ensure that Q&A data remained an open data repository. Posts can be freely reused, re-published, etc, so long as attribution is provided (who is the post BY, and where it was published), and derivative versions are also shared under the same license (ie, Share Alike).

Enforce a specific constraint to be checked first?

Fri, 06 Oct 2023 21:09:33 -0400

Question

I have the following SQL Server table :

create table Account(
 -- column names with their data types and properties
 Id int not null identity primary key,
 User varchar(50) not null,
 Job varchar(200) not null,
 
 -- table limitations
 constraint UniqueUserPerAccount unique (User),
 constraint UniqueJobPerAccount unique (Job),
)

For the two constraints I listed the more important constraint first hoping that if both constraints are violated, the first one would be triggered and displayed to the user. However, it appears the constraints are declared alphabetically by column name and therefore if both constraints fail, the UniqueJobPerAccount error, and only this error, is stated to have been violated.

How to convert from nchar to decimal in SQL?

Mon, 10 May 2021 18:29:23 -0400

Question

I have 2 tables(source and destination) which are respectively NOR_LABOR and ALL_LABOR_DETAILS. In the source table(NOR_LABOR) there is a column feet_produced with the data type nchar(10). In the destination table(ALL_LABOR_DETAILS) there’s a column labor_feet_produced with the data type decimal(18,4). I want to convert the feet_produced from nchar(10) to decimal(18,4) and paste it in the ALL_LABOR_DETAILS table’s labor_feet_produced column.

Restoring a SQL Server 2012 database in high availability

Wed, 12 Nov 2014 14:42:35 -0500

Question

I have a database which is in always-on high availability mode synchronized with another database on a different instance. How can I restore from a .bak file into the primary database using T-SQL?

I’m new to high availability and I’ve been advised that I need to take the database out of high availability before I can do a restore and then put it back in high availability again but I’m not sure.