sql - How to use INSTR() and SUBSTR() -


i have small example, of how use instr() , substr() example:

string = 'test = "2"'; apostrophe1:= instr(string,'"',1,1); apostrophe2:= instr(string,'"',1,2); equal:= instr(string,'=',1,1);  f_property_name:= substr(v1,1,equal-2); f_property_value:= substr(v1,(apostrophe1)+1,(apostrophe2)-2); dbms_output.put_line(f_property_name||' = '||f_property_value);

i wish have result like: test = 3. result is: test = 3" can explain mistake?

f_property_value:= regexp_replace(substr(v1,(apostrophe1)+1,(apostrophe2)-2),'"','');

it working this.


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