Sql 将行拆分为多行Oracle

我有一个有5列的表：ID，ERROR1，ERROR2，ERROR3，ERROR4

小样本如下所示：

ID | Error 1 | Error 2 | Error 3 | Error 4 | 12 | YES | (null) | (null) | YES | 15 | (null) | YES | (null) | YES | 因此，我需要了解如何在多个列中用Yes分隔一行数据，并将其转换为具有相同ID的多个实例，并且对于该实例，只有一列读取Yes。因此，有两条12的记录和两条15的记录，每一条记录只有一个错误，对于任何一行，其余的都为空

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谢谢你

也许会有帮助，但我不确定我是否正确理解了你的预期结果：

 SELECT ID, Error1, NULL AS Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error1 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error2 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, Error3, NULL AS Error4
   FROM table
  WHERE Error3 = 'YES'
   UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, NULL AS Error3, Error4
   FROM table
  WHERE Error4 = 'YES'

---

也许这有帮助，但我不确定，如果我正确理解您的预期结果：

 SELECT ID, Error1, NULL AS Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error1 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error2 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, Error3, NULL AS Error4
   FROM table
  WHERE Error3 = 'YES'
   UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, NULL AS Error3, Error4
   FROM table
  WHERE Error4 = 'YES'

---

也许这有帮助，但我不确定，如果我正确理解您的预期结果：

 SELECT ID, Error1, NULL AS Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error1 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error2 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, Error3, NULL AS Error4
   FROM table
  WHERE Error3 = 'YES'
   UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, NULL AS Error3, Error4
   FROM table
  WHERE Error4 = 'YES'

---

也许这有帮助，但我不确定，如果我正确理解您的预期结果：

 SELECT ID, Error1, NULL AS Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error1 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, Error2, NULL AS Error3, NULL AS Error4
   FROM table
  WHERE Error2 = 'YES'
  UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, Error3, NULL AS Error4
   FROM table
  WHERE Error3 = 'YES'
   UNION
    ALL
 SELECT ID, NULL AS Error1, NULL AS Error2, NULL AS Error3, Error4
   FROM table
  WHERE Error4 = 'YES'

---

作为另一种解决方案，您可以在上联接您的表，并在join子句中使用不等于NULL的受益人：

---

请参见

作为替代解决方案，您可以在上联接表，并在join子句中使用不等于NULL的受益人：

---

请参见

作为替代解决方案，您可以在上联接表，并在join子句中使用不等于NULL的受益人：

---

请参见

作为替代解决方案，您可以在上联接表，并在join子句中使用不等于NULL的受益人：

---

请参见

我想您正在查找以下查询的输出

SELECT ID,
DECODE(COL_NUM,
    1, "ERROR 1",
    2, "ERROR 2",
    3, "ERROR 3",
    "ERROR 4") AS ERROR_COL
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) AS ERROR
FROM
TABLE,
(SELECT ROWNUM AS COL_NUM FROM DUAL WHERE ROWNUM<5)
WHERE
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) IS NOT NULL 

ID—错误\u列—错误

12--错误1--是

12--错误4--是

15--错误2--是

---

15--错误4--是

我想您正在寻找以下查询的输出

SELECT ID,
DECODE(COL_NUM,
    1, "ERROR 1",
    2, "ERROR 2",
    3, "ERROR 3",
    "ERROR 4") AS ERROR_COL
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) AS ERROR
FROM
TABLE,
(SELECT ROWNUM AS COL_NUM FROM DUAL WHERE ROWNUM<5)
WHERE
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) IS NOT NULL 

ID—错误\u列—错误

12--错误1--是

12--错误4--是

15--错误2--是

---

15--错误4--是

我想您正在寻找以下查询的输出

SELECT ID,
DECODE(COL_NUM,
    1, "ERROR 1",
    2, "ERROR 2",
    3, "ERROR 3",
    "ERROR 4") AS ERROR_COL
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) AS ERROR
FROM
TABLE,
(SELECT ROWNUM AS COL_NUM FROM DUAL WHERE ROWNUM<5)
WHERE
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) IS NOT NULL 

ID—错误\u列—错误

12--错误1--是

12--错误4--是

15--错误2--是

---

15--错误4--是

我想您正在寻找以下查询的输出

SELECT ID,
DECODE(COL_NUM,
    1, "ERROR 1",
    2, "ERROR 2",
    3, "ERROR 3",
    "ERROR 4") AS ERROR_COL
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) AS ERROR
FROM
TABLE,
(SELECT ROWNUM AS COL_NUM FROM DUAL WHERE ROWNUM<5)
WHERE
DECODE(COL_NUM,
        1, ERROR1,
        2, ERROR2,
        3, ERROR3,
        ERROR4) IS NOT NULL 

ID—错误\u列—错误

12--错误1--是

12--错误4--是

15--错误2--是

15--错误4--是