Sql 如何使用oracle按要求拆分给定字符串
我需要拆分名称以插入数据库。下面给出了一些示例字符串Sql 如何使用oracle按要求拆分给定字符串,sql,string,oracle,substring,Sql,String,Oracle,Substring,我需要拆分名称以插入数据库。下面给出了一些示例字符串 Covey, Stephen J, Mr Clinton, Hilary B, Obama, Barack, Mr 我需要像下面那样拆分上面的字符串 First_Name Middle_Initial Last_NAME Title Stephen J Covey Mr Hilary B
Covey, Stephen J, Mr
Clinton, Hilary B,
Obama, Barack, Mr
First_Name Middle_Initial Last_NAME Title
Stephen J Covey Mr
Hilary B Clinton
Barack Obama Mr
这是Alexander的答案，修改后的正则表达式处理空列表元素。哦，与其重复这个正则表达式，不如创建一个如下所述的函数，使其可重用：，然后调用它。这样，所有人都可以封装和重用代码，只有一个地方可以在必要时更改代码：
SQL> with tbl(input_row) as (
select 'Covey, Stephen J, Mr' from dual
union
select 'Clinton,,Ms' from dual
union
select 'Obama, Barack, Mr' from dual
)
SELECT TRIM( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 1, NULL, 1)) AS Last_NAME,
TRIM( REGEXP_SUBSTR( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 2, NULL, 1), '[^ ]+', 1, 1)) AS First_Name,
TRIM( REGEXP_SUBSTR( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 2, NULL, 1), '[^ ]+', 1, 2)) AS Middle_Initial,
TRIM( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 3, NULL, 1)) AS Title
FROM tbl;
LAST_NAME FIRST_NAME MIDDLE_INITIAL TITLE
-------------------- -------------------- -------------------- --------------------
Clinton Ms
Covey Stephen J Mr
Obama Barack Mr
SQL>
这是Alexander的答案，修改后的正则表达式处理空列表元素。哦，与其重复这个正则表达式，不如创建一个如下所述的函数，使其可重用：，然后调用它。这样，所有人都可以封装和重用代码，只有一个地方可以在必要时更改代码：
SQL> with tbl(input_row) as (
select 'Covey, Stephen J, Mr' from dual
union
select 'Clinton,,Ms' from dual
union
select 'Obama, Barack, Mr' from dual
)
SELECT TRIM( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 1, NULL, 1)) AS Last_NAME,
TRIM( REGEXP_SUBSTR( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 2, NULL, 1), '[^ ]+', 1, 1)) AS First_Name,
TRIM( REGEXP_SUBSTR( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 2, NULL, 1), '[^ ]+', 1, 2)) AS Middle_Initial,
TRIM( REGEXP_SUBSTR(input_row, '([^,]*)(,|$)', 1, 3, NULL, 1)) AS Title
FROM tbl;
LAST_NAME FIRST_NAME MIDDLE_INITIAL TITLE
-------------------- -------------------- -------------------- --------------------
Clinton Ms
Covey Stephen J Mr
Obama Barack Mr
SQL>
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
CREATE TABLE Names ( Name ) AS
SELECT 'Covey, Stephen J, Mr' FROM DUAL
UNION ALL SELECT 'Clinton, Hilary B,' FROM DUAL
UNION ALL SELECT 'Obama, Barack, Mr' FROM DUAL
SELECT REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 1 ) AS Last_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 2 ) AS First_Name,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 4 ) AS Middle_Initial,
REGEXP_SUBSTR( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', 1, 1, NULL, 5 ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
SELECT REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\1' ) AS Last_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\2' ) AS First_Name,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\4' ) AS Middle_Initial,
REGEXP_REPLACE( Name, '^(.*?),\s*(.*?)(\s+(\w))?,\s*(.*)$', '\5' ) AS Title
FROM Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
WITH Split_Names AS (
SELECT REGEXP_SUBSTR( Name, '^[^,]+' ) AS Last_Name,
REGEXP_REPLACE( Name, '^.*?,\s*|\s*,.*?$' ) AS Given_Names,
REGEXP_SUBSTR( Name, '[^\s,]+$' ) AS Title
FROM Names
)
SELECT Last_Name,
REGEXP_REPLACE( Given_Names, '\s+\w$' ) AS First_Name,
TRIM( REGEXP_SUBSTR( Given_Names, '\s+\w$' ) ) AS Middle_Initial,
Title
FROM Split_Names
| LAST_NAME | FIRST_NAME | MIDDLE_INITIAL | TITLE |
|-----------|------------|----------------|--------|
| Covey | Stephen | J | Mr |
| Clinton | Hilary | B | (null) |
| Obama | Barack | (null) | Mr |
为什么不基于java代码创建一个函数呢？是的。已经做了。尝试了解使用sql是否可能，以便我可以在sql和measure中进行更改performance@SqlNerd8小时前，你发布了同样的问题，比如：。@Tarun这是一个不同的问题，是的，这是为了同样的工作。但是，我也需要其他选择。@SqlNerd解析一个人的名字在这里定期被询问。下面是一个例子，为什么不基于java代码创建一个函数呢。已经做了。尝试了解使用sql是否可能，以便我可以在sql和measure中进行更改performance@SqlNerd8小时前，你发布了同样的问题，比如：。@Tarun这是一个不同的问题，是的，这是为了同样的工作。但是，我也需要其他选择。@SqlNerd解析一个人的名字在这里定期被询问。下面是一个例子，警告！当列表中存在空元素时，通常用于分析分隔字符串的“[^，]+”格式的正则表达式将失败。确保你的测试彻底。总是期待意外！请参阅此处了解更多详细信息和改进的正则表达式：完美。！！谢谢。：）@Gary_W您是想说，如果输入行为null，即如果输入字符串为null，正则表达式将失败？否，如果该列表中的元素为null，并且您在该值之后还是在该值之后（有关更多信息，请参阅我提供的链接）。i、 e.尝试将其作为输入数据：
'Clinton，，Ms''Clinton，，Ms'regexp\u substrREGEXP_SUBSTR