This is my Sql:
SELECT t.RUFNAME, count(v_anschrift.rufname) as Anrufe FROM v_termin, ( SELECT RUFNAME FROM V_Anschrift WHERE V_ANSCHRIFT.SPERRKZ = 0 AND V_ANSCHRIFT.OEM != 0 ) t JOIN v_anschrift ON (t.Rufname = v_anschrift.RUFNAME) LEFT JOIN v_termin ON (v_termin.anschriftid = v_anschrift.anschriftid) WHERE v_termin.TERMINART = 20 GROUP BY t.RUFNAME;
And i get this error message:
ORA-00918: Spalte nicht eindeutig definiert 00918. 00000 – “column ambiguously defined” *Cause:
*Action: Fehler in Zeile: 15 Spalte: 7
where is my mistake?
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Answer
I suspect you actually want something like this:
SELECT t.RUFNAME, COUNT(*) as Anrufe FROM v_termin t JOIN v_anschrift a ON t.anschriftid = a.anschriftid WHERE t.TERMINART = 20 AND a.SPERRKZ = 0 AND a.OEM <> 0 GROUP BY t.RUFNAME;
You have repeated table references in the FROM
clause — and the repetitions have no obvious logic.