select rows where column contains same data in more than one record code example

Example 1: sql select rows with different values in one column

SELECT *
FROM YourTable
WHERE ARIDNR IN (
    SELECT ARIDNR
    FROM YourTable
    GROUP BY ARIDNR
    HAVING COUNT(*) > 1
)

Example 2: select all same column value in sql

SELECT RollId, count(*) AS c FROM `tblstudents` GROUP BY RollId HAVING c > 1 ORDER BY c DESC

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