从DB2列获取子字符串

Question

我有：AAAA / DATA1 / Data2; xyx; pqr这个我想要的数据：DATA1和Data2

Answer 1

如果这是针对特定行，也许使用SUBSTR？就像是

SELECT 
  SUBSTR(column, 6, 5) AS col1
, SUBSTR(column, 13, 5) AS col2
 FROM table

这是你可以做的其他事情..虽然它变得非常复杂，但这不是你正在寻找的确切答案，但它会让你开始。希望这可以帮助：

WITH test AS (
SELECT characters
  FROM ( VALUES
  (   'AAAA/DATA1/Data2;xyx;pqr'
  ) )
    AS testing(characters)
)
SELECT 
    SUBSTR(characters, 1, LOCATE('/', characters) - 1) AS FIRST_PART
  , SUBSTR(characters, LOCATE('/', characters) + 1) AS SECOND_PART
  , SUBSTR(characters, LOCATE('/', characters, LOCATE('/', characters) + 1) + 1) 
      AS THIRD_PART
    FROM test
;

遗憾的是，DB2没有这个功能。看看这个答案：How to split a string value based on a delimiter in DB2