[英]SQL concat column with one to many relationship
這可能很好:
WITH Concatetated AS (
SELECT PrimaryId, '[' + STRING_AGG(TypeCode, '] [') + ']' AS "ConcatField"
FROM Table2
GROUP BY PrimaryId
)
SELECT t1."PrimaryId", t1."Name", c."ConcatField"
FROM Table1 t1
LEFT JOIN Concatetated c
ON t1.PrimaryId = c.PrimaryId
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