how I can create check sum to validate no changes at int string pairs on table
Business case is. 1)Users print document on paper 2)users carry printed paper to Boss, Boss sing on paper 3)after that users going to administrator to digitally sign that paper. My task is to help...
View ArticleComplex constraint across all data in a table
We have a table to record processing that occurs on a system and we need to ensure that only a single row has an ‘in process’ status. I want to ensure that the result of this is always either zero or...
View ArticleHow is data integrity maintained in a clustered environment when schema changes?
Scenario A clustered environment running N identical application nodes interacting with a single relational database. Problem Is it possible to upgrade the nodes to a new application version, which...
View ArticlePostgreSQL 9.2 tstzrange null/infinity CONSTRAINT CHECK
I’d like to limit a PostgreSQL 9.2 tstzrange to valid dates at both ends. No NULLs nor ‘infinity’. Various revisions of this SQL isn’t constraining ‘-/+infinity’ input: CREATE TABLE bill ( id serial...
View ArticleData exchange between 2 remote postgresql databases
As per subject I’m looking into a reliable way to synchronize 2 tables that have a same structure between two remote postgresql databases. I was thinking about dblink but an not really sure as in the...
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Understanding how relationship sides works
So, I have this relations on my tables (see image) and I need to understand some things. I’ll enumerate what I understand and what I need from yours is to say if I’m right or not and in case I’m not...
View Articlealerting that an object cannot be deleted (due to constraints)
Assume an application with a rich domain model with many classes (e.g School, Classroom, Teacher, Student, Course, Exam, Submission, …) linking to each other. Model and links are mapped to the database...
View ArticleWill “Trash” in Google Docs be automatically deleted?
Google Support – Trash says: Anything you remove from Google Drive will be in your Trash until you permanently delete the files or restore them. However, they are known to be loose with words, and...
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How to verify a SSAS Backup and how to perform Integrity Checks in SSAS?
I have a procedure to backup SSAS Databases that is working successfully. I also delete the SSAS backup files that are older than 2 days. What I am looking forward to implement is: 1) How to verify my...
View ArticleCheckDB error 9003 SQL server 2014
Currently I am restoring SAN snapshots to another server nightly and running weekly checkdbs on that test server. The checkdb is throwing the following errors. The log scan number (105217:402:0) passed...
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