Question

SQL Server

我有一个包含逗号分隔字符串的参数：

'ABC，DEF，GHI'

我想在IN语句中使用该字符串，它将采用我的参数：

select * from tableA where val IN ('abc','def','ghi')

关于如何做到这一点的任何想法？

Answer 1

如果使用动态SQL是一个选项，则可以执行此操作：

SELECT 'SELECT * FROM tableA WHERE val IN (' +
       '''' + REPLACE('abc,def,ghi', ',', ''',''') + ''')'

基本上，REPLACE()功能会将每个项目分开＆＃39; ，而不仅仅是，。

Answer 2

最简单的方法是做这样的事情：

SELECT *
FROM TableName
WHERE ',' + commaDelimitedString + ',' LIKE '%,' + FieldName + ',%'

但要注意SQL注入。您可能想要参数化它。

Answer 3

您可以使用此SQL来“转移”＃39;以逗号分隔的字符串到表中;

DECLARE @badData TABLE (id INT NOT NULL, txt NVARCHAR(max));

INSERT INTO @badData
VALUES (1, 'foo,bar,baz'), (2, NULL);;

-- the idea is to recursively 'pop' a value from the start of the string, splitting it into 'head' and 'tail' components
WITH unpacked (id, head, tail)
AS (
  SELECT id, LEFT(txt, CHARINDEX(',', txt + ',') - 1), STUFF(txt, 1, CHARINDEX(',', txt + ','), '')
  FROM @badData

  UNION ALL

  SELECT id, LEFT(tail, CHARINDEX(',', TAIL + ',') - 1), STUFF(tail, 1, CHARINDEX(',', tail+ ','), '')
  FROM unpacked
  WHERE tail > ''
  )
SELECT id, head
FROM unpacked
ORDER BY id

您可以将此结果粘贴到公用表表达式中，然后编写一个where子句，如

select * from tableA where val IN (select head from unpacked)

严重抄袭https://stackoverflow.com/a/5493616/6722

Answer 4

许多编程语言都有split（）函数，例如Ruby

'123,456,789'.split "," => ["123", "456", "789"]

SQL IN语句拆分参数

4 个答案: