sql server - Selecting Substring SQL -


i need select substring found between (). starting , ending position vary, length of substring. have had moderate success following not 100%.

it work values not others, return blanks , change values capitalization format, in other words if value 'test' display 'test'.

select substring(columnname, charindex('(', len(columnname)), charindex(')', columnname) - charindex('(',columnname)) input tablename

update there 1 set of parentheses ()

this work provided have single occurence of ( , ):

select      substring(columnname,                charindex('(', columnname)+1,                charindex(')', columnname) - charindex('(', columnname)-1) tablename

if have values not have (...) content, add clause:

where    charindex('(', columnname) > 0 ,           charindex(')', columnname) > charindex('(', columnname)

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