Question

我想从列中的字符串中获取服务器名称前

 CREATE TABLE #Sample(ServerPath varchar(50))
    GO
    INSERT INTO #Sample (ServerPath) VALUES ('\\TestServer1\Test')
    INSERT INTO #Sample (ServerPath) VALUES ('\\TestServer2\Test')
    INSERT INTO #Sample (ServerPath) VALUES ('\\TestServer3\Test')
INSERT INTO #Sample (ServerPath) VALUES ('TestServer4)
    SELECT * FROM #Sample 
    GO
    DROP TABLE #Sample`enter code here`

我希望在双斜杠到第一个单斜杠之间输出类似字符串

TestServer1  
TestServer2   
TestServer3

在sql中执行什么sql命令或正则表达式给出了我预期的结果。

Answer 1

这不需要是正则表达式（根据您的标记）。只需使用这样的东西。

CREATE TABLE #Sample(ServerPath varchar(50))
INSERT INTO #Sample (ServerPath) 
VALUES 
('\\TestServer1\Test')
,('\\TestServer2\Test')
,('\\TestServer3\Test')

SELECT 
SUBSTRING(ServerPath,3,CHARINDEX('\',ServerPath,3)-3) Result
FROM #Sample 

Result
TestServer1
TestServer2
TestServer3

这假设它始终以双反斜杠

开头

如果你有没有反斜杠的数据，那么先用它来检查;

CREATE TABLE #Sample(ServerPath varchar(50))
INSERT INTO #Sample (ServerPath) 
VALUES 
('\\TestServer1\Test')
,('\\TestServer2\Test')
,('\\TestServer3\Test')
,('TestServer4')

SELECT 
CASE
   WHEN CHARINDEX('\\',ServerPath) = 0
      THEN ServerPath
   ELSE SUBSTRING(ServerPath,3,CHARINDEX('\',ServerPath,3)-3)
END Result
FROM #Sample 
GO
DROP TABLE #Sample

Result
TestServer1
TestServer2
TestServer3
TestServer4

从sql表列的服务器路径获取服务器名称

1 个答案: