如何打印产生 multi-like case 语句结果的匹配模式?

How do I print the matched pattern that produced the result of a multi-like case statement?

我希望将 multi-like case when 语句中的字符串字段(标题)的匹配模式作为字符串值存储在列 (matched_pattern) 中 [=30] =].

示例table:


|      Title          |     Email        |
|---------------------|------------------|
|         CEO         | henry@test.com   |
|---------------------|------------------|
|         COO         | julien@test.com  |
|---------------------|------------------| 

我的查询是

select 
title,
email,
CASE WHEN lower(title) LIKE     '%cco%' OR
lower(title) LIKE '%ceo%' THEN 'CxO' ELSE null END persona
FROM table

我想要的结果是


|      Title |     Email        | Persona |matched_pattern  |
|------------|------------------|---------------------------|
|  CEO       | henry@test.com   | CxO     | '%ceo%'         |
|------------|------------------|---------|-----------------|
|  CcO       | julien@test.com  | CxO     | '%cco%'         |
|------------|------------------|---------|-----------------|

有没有办法将生成结果的代码存储在单独的列中?我使用了另一个案例语句来创建 matched_pattern 列

SELECT
title,
CASE WHEN lower(title) LIKE     '%cco%' THEN 'CxO'
CASE WHEN lower(title) LIKE     '%ceo%' THEN 'CxO'
ELSE null END persona,
CASE WHEN lower(title) LIKE     '%cco%' THEN '%cco%'
CASE WHEN lower(title) LIKE     '%ceo%' THEN '%ceo%'
ELSE null END matched_pattern
FROM table

有更好的方法吗?

如果你在另一个 table 或临时 table 或其他东西中实现模式,你可以简单地这样做:

SELECT *
FROM DataSource DS
LEFT JOIN Paterns P 
    ON DS.[Title] LIKE P.[patern]

这是 SQL 服务器上的完整工作示例:

CREATE TABLE DataSource
(
    [Title] VARCHAR(12)
   ,[Email] VARCHAR(32)
);

CREATE TABLE Paterns
(
    [patern] VARCHAR(12)
   ,[value] VARCHAR(12)
);

GO

INSERT INTO DataSource ([Title], [Email])
VALUES ('CEO', 'henry@test.com')
      ,('CEO', 'julien@test.com');

INSERT INTO Paterns ([patern], [value])
VALUES ('%ceo%', 'CxO')
      ,('%cco%', 'CxO')


SELECT *
FROM DataSource DS
LEFT JOIN Paterns P 
    ON DS.[Title] LIKE P.[patern]