trim the column value string - sql

Question

In SQL Query, I need the values as below using select query of my column.
Result has to be the text after the first space ' ' and before the first '('
Source Column
create Table Test_Table (Column1 Varchar(50))
Insert into Test_Table Values
('0636 KAVITHI (LOC)'),
('0638 SRI KRISHNA (NAT)'),
('0639 SELVAM'),
('0643 GOOD SERVICE (LOC)'),
('0644 FINA CARE EVENT (LOC)')
I need get the string found between first ' ' and the '('
Expected Result
KAVITHI
SRI KRISHNA
SELVAM
GOOD SERVICE
FINA CARE EVENT

Answer 1

Another approach without using an OUTER APPLY.
SELECT CASE WHEN Column1 LIKE '%(%'
THEN SUBSTRING(RIGHT(Column1,LEN(Column1)-CHARINDEX(' ',Column1)),0,
CHARINDEX('(',RIGHT(Column1,LEN(Column1)-CHARINDEX(' ',Column1)),0))
ELSE RIGHT(Column1,LEN(Column1)-CHARINDEX(' ',Column1))
END AS Trimmed
FROM Test_Table
OUTPUT
Trimmed
KAVITHI
SRI KRISHNA
SELVAM
GOOD SERVICE
FINA CARE EVENT
SQL Fiddle: http://sqlfiddle.com/#!3/69dd1/20/0

Answer 2

CHARINDEX() can be used to find the position of specific characters.
OUTER APPLY can be used to find the position of the space and brace characters, and store them in a place that you can re-use them.
SUBSTRING() can be used to find the text between the space and the brace.
EDIT: Added CASE to cope with values that contain no (.
SELECT
SUBSTRING(
test_table.column1, -- the field we're searching
stats.idx_space + 1, -- starting from the character after the first space
CASE
WHEN stats.idx_brace > stats.idx_space
THEN stats.idx_brace
ELSE stats.idx_eos
END
-
stats.idx_space -- for as many characters as there are between the space and the brace
)
FROM
test_table
OUTER APPLY
(
SELECT
CHARINDEX(' ', test_table.column1) AS idx_space, -- position of the first space
CHARINDEX('(', test_table.column1) AS idx_brace, -- position of the first brace
LEN(test_table.column1) AS idx_eos -- position of the end-of-string
)
AS stats
EDIT: A single "line", as requested.
Do note that forcing this as a single line does make this harder to read, maintain and adapt. One of APPLY's strongest use-cases is to maintain DRY (Don't Repeat Yourself) principles.
This query repeats several parts several times:
- find the first space repeated 2 times
- find the first brace repeated 3 times
SELECT
SUBSTRING(
test_table.column1,
CHARINDEX(' ', test_table.column1) + 1,
CASE
WHEN CHARINDEX('(', test_table.column1) > CHARINDEX(' ', test_table.column1)
THEN CHARINDEX('(', test_table.column1)
ELSE LEN(test_table.column1)
END
-
CHARINDEX('(', test_table.column1)
)
FROM
test_table