[Solved] data not showing with sno

by


The following should get what you’re asking for:

INSERT INTO SOME_TABLE (SNO, USERID)
  VALUES ((SELECT NVL(MAX(SNO)+1, 1)
             FROM SOME_TABLE
             WHERE USERID = &userid),
          &userid);

where &userid is your USERID value.

SQLFiddle here

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solved data not showing with sno