尾隨空格plsql

Question

我需要找出尾隨空格的記錄。我試圖通過使用Length(rtrim)來構建查詢，但它沒有返回所需的記錄。

例如

abc " 
abc  " 
abc                " 

請協助

Answer 1

，我認爲你是在正確的軌道上。以下示例將返回第二個和第三個文本，但不是第一個。

SELECT * FROM 
    (SELECT 'abc' AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc  ' AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc      ' AS text FROM DUAL) 
WHERE LENGTH(RTRIM(text)) != LENGTH(text); 

或者某個表YOURTABLE包含文字與可能尾隨空格列YOURCOLUMN：

SELECT * FROM 
YOURTABLE 
WHERE LENGTH(RTRIM(YOURCOLUMN)) != LENGTH(YOURCOLUMN); 

如果你也有HORIZONTAL TAB，LINE FEED，或CARRIAGE RETURN可以使用TRANSLATE函數來處理這些作爲正常空間：

SELECT * FROM 
    (SELECT 'abc' AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc' || CHR(09) AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc' || CHR(10) AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc' || CHR(13) AS text FROM DUAL 
    UNION ALL 
    SELECT 'abc   ' AS text FROM DUAL) 
WHERE LENGTH(RTRIM(TRANSLATE(text, CHR(09) || CHR(10) || CHR(13), ' '))) != LENGTH(text);