Latest Backup

Blogs

Control Flow Restartability in Azure Data Factory

By

I presented at SQL Saturday Pittshburgh this past weekend about populating your data warehouse...

Monday Monitor Tips: Knowing Your RPO

By

A customer was asking recently about the RPO for their estate, and I showed...

Webinar tomorrow: The Role of Databases in the Era of AI

By

I’m hosting a webinar tomorrow with Rie Merritt from Microsoft. We’ll be talking about...

Read the latest Blogs

Forums

Git Repo(s) for SQL Server Database, SSIS, SSAS, SSRS, PowerBI

By robertritter

Hey all, Just wondering how do you guys / girls set up git repo(s)...

best choice for index when creating a composite key

By water490

hi everyone I am planning on adding a composite key for my tables.  I...

Best Approach to cutover from Test to Live with new columns and tables added

By JP789

We have a Production/Live version with up-to-date data and a Test version with older...

Visit the forum

Question of the Day

STRING_AGG's behavior

Executing the following script (Sql Server 2022), you get the table t0 with 10 rows:
CREATE TABLE t0
( id     INT PRIMARY KEY
, field1 VARCHAR(1000)
, field2 VARCHAR(MAX));
INSERT INTO t0
SELECT
  gs.value
, REPLICATE ('X', 1000)
, REPLICATE ('Y', 1000)
FROM generate_series(1, 10, 1) gs;
GO
What happens if you execute the following statements?
  1. select STRING_AGG(field1, ';') within group (order by id)  from t0;
  2. select STRING_AGG(field2, ';') within group (order by id)  from t0;

See possible answers