I'm receiving the following error when attempting to run a T-SQL MERGE statement: "Msg 8672, Level 16, State 1, Line 123. The MERGE statement attempted to UPDATE or DELETE the same row more than once. This happens when a target row matches more than one source row.
2024-02-05
I don’t think I’ve ever had a great impression of Azure SQL Database as a place for production applications. In its early days, it was missing several important features (like data compression). While that hole has been plugged, there are still other limitations and differences you should be aware o
2024-02-02
Learn how to capture errors in SQL Server stored procedures and gracefully handle errors using Try Catch coding in your stored procedures.
2024-01-31
Have you ever been in a situation that you want to call a cmdlet or a function with a parameter that depends on a conditional criteria that is available as a list? In this article I will show a technique where you can use PowerShell Dynamic Parameters to assist the user with parameter values.
2024-01-29
One of the most rarely used commands in SQL is the WAITFOR command. It is one option to invoke a delay in program execution in absentia. Because it is sparsely used, how and where it can be applied when needed is often forgotten. For example, we could use this to mimic a user response or input or perhaps to collect data at certain intervals during the day.
2024-01-26
If you can convert a SQL file to HTML, then you can inspect your Flyway migration files in a browser. This is especially useful if your SQL is color-coded with the same conventions as it was in your IDE. It is even better still if your browser can allow you to scan through many files, moving from file to file with a single click. This article will demonstrate how to do this with a few PowerShell scripts.
2024-01-24
Data lineage is a component of modern data management that helps organizations understand the origins, transformations, and movement of their data. It is like a road map that shows us where our data has been, how it has changed, and where it is going, just like tracking the journey of a package:
2024-01-22
MongoDB is a document database. As such, the data is stored as individual documents. A document is a data structure made up of one or more field/value pairs.
2024-01-19
Packing intervals is a classic SQL task that involves packing groups of intersecting intervals to their respective continuous intervals. In mathematics, an interval is the subset of all values of a given type, e.g., integer numbers, between some low value and some high value.
2024-01-17
Aggregation is a widely used way to summarize the content of a database. It is usually expressed with GROUP BY clause or just using aggregate functions (like COUNT or SUM). When the database engine executes a query with aggregations, it produces individual rows need to compute the required output and then performs the aggregation as (almost) last step. We discuss in this article how to re-write a query manually so that the order of operations will be different and when it can be beneficial.
2024-01-15
By Steve Jones
A customer was trying to compare two tables and capture a state as a...
By Zikato
When I'm looking at a query, I bet it's bad if I see... a...
By Steve Jones
This month is a milestone for T-SQL Tuesday. It’s number 200, which doesn’t sound...
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Comments posted to this topic are about the item Checking the Error Log I
On my SQL Server 2025, I want to search the error log from my T-SQL code for potential issues and then inform an administrator. What is the current way to easily query the error log?
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