2023-09-06
336 reads
SQL Server 2016
Has SQL Server Performance Improved?
This week Steve found a question of whether SQL Server 2019 uses more CPU than 2016.
2023-04-01
605 reads
2021-09-08
761 reads
Fixing "Login failed for user" error in SQL Server
In this article, I am going to explain fixing a problem related login failure error with SQL Server. The Problem One of the common error in the SQL Server error log is "Login failed for user 'DomainName\ServerName$'. Reason: Could not find a login matching the name provided. [CLIENT: <local machine>]". Even though it says that […]
2020-11-24
45,284 reads
Converting a History Table into a System-Versioned Temporal Table
Temporal tables were introduced with SQL Server 2016. To take advantage of this feature, you might start fresh with a brand new table. It is possible, however, to convert an existing table with accumulated history to the new functionality. In this article, Mala Mahadevan explains how to create temporal tables for both scenarios.
2019-04-01
Approaches to Import JSON in SSIS (SQL Server 2016+) Part 2
In this article, 2nd of 2-part series, we will look at the 3rd approach to import JSON, recap both parts of the series and form a conclusion.
2020-03-20 (first published: 2018-08-27)
6,057 reads
Approaches to Import JSON in SSIS (SQL Server 2016+) Part 1
In this article, 1st of 2-part series, we will look at 2 approaches to import JSON in SSIS using 2 methods: the new functionality of SQL Server 2016 and the Json.NET library.
2020-03-13 (first published: 2018-08-20)
31,243 reads
2018-03-13
955 reads
2018-02-15
893 reads
Live Query Plans and Blocking
Erik Darling looks at how SQL Server 2016's live query plans react when they're blocked.
2017-11-01
3,227 reads
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STRING_AGG's behavior
Comments posted to this topic are about the item STRING_AGG's behavior
The Role of Databases in the Era of AI
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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;
GOWhat happens if you execute the following statements?
select STRING_AGG(field1, ';') within group (order by id) from t0;
select STRING_AGG(field2, ';') within group (order by id) from t0;