Question

我有查询：

SELECT DISTINCT
"id",
                  "fn" || ' ' || "ln" || '/' ||  "bi" || '('|| TRUNC((months_between(sysdate, "bi") /12)) || ')/' || "pol" || '/ ' || "pol2" AS "INFO",
    "cn" ,
    "ci",
    TO_CHAR("di" , 'DD-MON-YYYY')  AS "DIST",
    "cif" AS  "Cand. Indp." AS "CIF FLAG",
    TO_CHAR("ecd", 'DD-MON-YYYY')   AS "ECD DATE",
     trim(both '/' from ("DSD") ) AS  "DSD DATE",
    trim(both '/' from ("TSD"   ))  AS "TSD DATE",
    "com"  AS "COMMENTS",
    "SMF" AS "SM Flag"
FROM "MY_TABLE"
ORDER BY "ln";

我收到错误ORA-01791：不是选定的表达式。

我用谷歌搜索错误，问题似乎是不同的和顺序不一起工作。我尝试分组而不是使用max（“ln”），但是使用连接列我无法弄清楚如何对它们进行分组。我基本上看是如何在ln上对结果进行排序的？

Answer 1

您不是通过ORDER BY“ln”

选择的

您只能按所选列选择或添加选择

SELECT DISTINCT
    "id",
     "fn" || ' ' || "ln" || '/' ||  "bi" || '('|| TRUNC((months_between(sysdate, "bi") /12)) || ')/' || "pol" || '/ ' || "pol2" AS "INFO",
     "ln",
    "cn" ,
    "ci",
    TO_CHAR("di" , 'DD-MON-YYYY')  AS "DIST",
    "cif" AS  "Cand. Indp." AS "CIF FLAG",
    TO_CHAR("ecd", 'DD-MON-YYYY')   AS "ECD DATE",
     trim(both '/' from ("DSD") ) AS  "DSD DATE",
    trim(both '/' from ("TSD"   ))  AS "TSD DATE",
    "com"  AS "COMMENTS",
    "SMF" AS "SM Flag"
FROM "MY_TABLE"
ORDER BY "ln";

或按

更改订单

SELECT DISTINCT
    "id",
     "fn" || ' ' || "ln" || '/' ||  "bi" || '('|| TRUNC((months_between(sysdate, "bi") /12)) || ')/' || "pol" || '/ ' || "pol2" AS "INFO",
    "cn" ,
    "ci",
    TO_CHAR("di" , 'DD-MON-YYYY')  AS "DIST",
    "cif" AS  "Cand. Indp." AS "CIF FLAG",
    TO_CHAR("ecd", 'DD-MON-YYYY')   AS "ECD DATE",
     trim(both '/' from ("DSD") ) AS  "DSD DATE",
    trim(both '/' from ("TSD"   ))  AS "TSD DATE",
    "com"  AS "COMMENTS",
    "SMF" AS "SM Flag"
FROM "MY_TABLE"
ORDER BY 2;

查询 - 按返回不同行

1 个答案: