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.

AG secondary is out of sync for hours after index maintenance

Tue, 21 Feb 2023 13:17:04 -0500

Question

We have a 3TB OLTP database running Siemens Opcenter MES software at one of our manufacturing plants in China. This is setup in an Always-On Availability group with one secondary node. As this is a manufacturing plant, we are only provided 11 1/2 hours every two weeks to run index maintenance when the plant is not running production. We use Hallengren scripts to run this index maintenance.

2023 on Andy M Mallon - AM²

Enforce a specific constraint to be checked first?

Question

AG secondary is out of sync for hours after index maintenance

Question