Rewriting MySQL to MSSQL - mysql

Question

So I'm trying to rewrite a MySQL query to MSSQL, but it's not as easy as I thought, since the functions from MySQL are not used in MSSQL(2014).
My MySQL query looks like this:
SELECT
(SELECT
REPLACE(GROUP_CONCAT(DISTINCT CONCAT(versions.Name, ': ', versions.Version)),
',',
', </br>') AS VersionString
FROM
target
LEFT JOIN
versions ON versions.targetid = target.id
WHERE
target.TestJobId = testruns.TestJobId
AND versions.Name = 'SW') AS NameVersion
FROM
testruns
I've tried to rewrite it, but I can't seem to make it work.
SELECT
(SELECT stuff(
(SELECT DISTINCT ', <br>' + cast([testreportingdebug].versions.Name + ': ' + [testreportingdebug].versions.Version AS VARCHAR(max))
FROM [SwMetrics].[testreportingdebug].[target]
FOR XML path('')
), 1, 1, '') AS VersionString
FROM
[testreportingdebug].[target]
LEFT JOIN
[testreportingdebug].[versions] ON [testreportingdebug].[versions].[targetid] = [testreportingdebug].[target].[id]
WHERE
[testreportingdebug].[target].[TestJobId] = [testreportingdebug].[testruns].[TestJobId]
AND [testreportingdebug].[versions].[Name] = 'SW') AS NameVersion
FROM
[testreportingdebug].[testruns];
The error I get is:
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
I'm a bit stuck what/how to rewrite this query. How can I rewrite it to work in SQL Server?

Answer 1

In SQL server STRING_AGG() replaces GROUP_CONCAT() and we can specify the seperator as </br>.
SELECT
STRING_AGG(
DISTINCT CONCAT(
versions.Name,
': ',
versions.Version,
'</br') AS VersionString
FROM target
LEFT JOIN versions
ON versions.targetid = target.id
AND target.TestJobId = testruns.TestJobId
WHERE versions.Name = 'SW';