2

是否有空格或其他非打印字符可以插入到不会被修剪掉并导致 NULL 的 varchar2 列中？

我只想在列中插入一个空白，以便在 SSRS 2008 报告中不显示任何内容。该列是 PK 的一部分，因此它不能为 NULL。当然 using''不起作用，因为这在 Oracle 中被视为 NULL，并且' '不起作用，因为它是 varchar2 并修剪为 NULL。

那么是否有一个文字值我可以插入而不是在 SSRS 中显示为空，但也可以插入到 Oracle 11g 中的不可为空的 varchar2 列中？

想了一会儿，我想像制表符这样的东西可以完成这项工作。但我期待您的建议。

更新

哎呀。猜猜修剪行为从何而来？我自己的 RTRIM！对于那个很抱歉。假设我被我对 Oracle 的缺乏经验所误导，我对此感到沮丧，这导致我确定错误出在产品中，而不是在我的查询中。但是，嘿，这不是一个简单的查询。

INSERT INTO WeeklyInvoice (GUID, Mo, VendorName, CostCenter, WkNum, Amt)
SELECT
   ExecID,
   Mo,
   VendorName,
   CostCenter,
   WkNum,
   Amt
FROM (
   WITH CostCenters AS (
      SELECT REGEXP_SUBSTR(CostCenterList, '[^,]+', 1, LEVEL) CostCenter
      FROM DUAL
      CONNECT BY LEVEL <= Length(CostCenterList) - Length(Replace(CostCenterList, ',', '')) + 1
   ), Invoices AS (
      SELECT
         TRUNC(I.Invoice_Dte, 'MM') Mo,
         (TRUNC(I.Invoice_Dte, 'W') - TRUNC(I.Invoice_Dte, 'MM')) / 7 + 1 WkNum,
         I.Vendor,
         V.Vendor_VName,
         RTrim(D.Dis_Acct_Unit) CostCenter,
         D.To_Base_Amt
      FROM
         CostCenters CC
         CROSS JOIN prod.IcCompany C
         INNER JOIN prod.ApDistrib D
            ON C.Company = D.Company
            AND D.Dis_Acct_Unit = CC.CostCenter
         INNER JOIN prod.ApInvoice I
            ON D.Invoice = I.Invoice
            AND D.Vendor = I.Vendor
            AND D.Suffix = I.Suffix
            AND D.Company = I.Company
         INNER JOIN prod.ApVenMast V ON I.Vendor = V.Vendor
      WHERE
         D.Cancel_Seq = 0
         AND I.Cancel_Seq = 0
         AND I.Invoice_Dte >= ADD_MONTHS(FromDate, -2)
         AND I.Invoice_Dte < ToDate
   ), Months AS (
      SELECT ADD_MONTHS(FromDate, LEVEL - 1) Mo
      FROM DUAL
      CONNECT BY LEVEL <= MONTHS_BETWEEN(ToDate, ADD_MONTHS(FromDate, -2))
   ), Names AS (
      SELECT DISTINCT
         I.Mo,
         I.Vendor,
         I.Vendor_VName,
         I.CostCenter
      FROM Invoices I
      UNION ALL
      SELECT M.Mo, '0', 'No Paid Invoices', ' '
      FROM Months M
      WHERE
         NOT EXISTS (
            SELECT I.*
            FROM Invoices I
            WHERE I.Mo = M.Mo
         )
   ), Weeks AS (
      SELECT LEVEL WkNum FROM DUAL CONNECT BY LEVEL <= 5
   )
   SELECT
      N.Mo,
      N.Vendor_VName VendorName,
      N.CostCenter,
      W.WkNum,
      Sum(I.To_Base_Amt) Amt
   FROM
      Names N
      INNER JOIN Weeks W
         ON W.WkNum < 5
         OR EXTRACT (MONTH FROM (N.Mo + 28)) = EXTRACT (MONTH FROM N.Mo)
      LEFT JOIN Invoices I
         ON N.CostCenter = I.CostCenter
         AND N.Vendor = I.Vendor
         AND N.Mo = I.Mo
         AND W.WkNum = I.WkNum
   GROUP BY
      N.Mo,
      N.Vendor_VName,
      N.CostCenter,
      W.WkNum
) X;
4

1 回答 1

2

在我下面的测试中，单个空格未转换为空值：

  SQL> CREATE TABLE t (col VARCHAR2 (10) NOT NULL);

  Table created.

  SQL> INSERT INTO t (col)
    2       VALUES (' ');

  1 row created.

  SQL> SELECT CASE col WHEN ' ' THEN 'I am a single space' ELSE 'I am not a space' END AS col FROM t;

  COL
  -------------------
  I am a single space

  1 row selected.

  SQL> SELECT LENGTH (col) FROM t;
  LENGTH(COL)
  -----------
            1

  1 row selected.

您是否在插入之前修剪值？

于 2011-01-11T20:32:26.047 回答