Sql查询OR函数来反转阿拉伯字符串

Question

我需要sql查询，它将反转阿拉伯字符串。

例如：

1. 字符串1：ABC DEF（假设ABC DEF为阿拉伯字符串）然后输出应该是CBA FED。
2. 字符串2：ABCDEF（假设ABCDEF为阿拉伯字符串）然后输出应为FEDCBA。

由于 Rajeev Naik

Answer 1

这是一个3步骤的过程

1. 使用空格作为分隔符将字符串拆分为行
2. 反转每个字符串
3. 将字符串重新加入

<强> Sql Fiddle Demo

WITH spaceSplit as (
    SELECT 
        t.id,
        trim(regexp_substr(t.text, '[^ ]+', 1, lines.column_value)) text, 
        lines.column_value as seq
    FROM t,
      TABLE (CAST (MULTISET
      (SELECT LEVEL FROM dual
              CONNECT BY LEVEL <= regexp_count(t.text, ' ')+1
      ) AS sys.odciNumberList ) ) lines
    ORDER BY id, lines.column_value
),
reverseString as (
    SELECT ID, REVERSE(text) as text, seq
    FROM spaceSplit
)
SELECT id, LISTAGG(text, ' ') WITHIN GROUP (ORDER BY seq) AS text
FROM   reverseString
GROUP BY id
;

<强>输出

| ID |     TEXT |
|----|----------|
|  1 |  CBA FED |
|  2 |   FEDCBA |
|  3 | BA DC FE |