Nettet1. INSTR ( ) function on dual table. We are aware of the fact that dual is a dummy table in SQL that is automatically created by the database. So in this example we are going to find a substring named ‘Good’ in the string ‘Rohan is a good boy’. We are going to use the INSTR function for this example. http://webiwip.com/interview-questions-answers/oracle-sql-interview-questions/13018
SUBSTR - Oracle Help Center
Nettet16. nov. 2015 · 1. If you want a regular expression you can use '\ ( [^ (]*\)$' - that is, an (escaped) opening parenthesis, any number of any other character, a closing parenthesis - and a $ to make it only match at the end of the string. There's a probably a neater way to make it a non-greedy match. Nettet9. aug. 2010 · As per Adam's answer, the greatest prevents the negative offset being longer than the string - i.e. substr ('this string',-9) will give the 9 rightmost characters of the string BUT not if the string is SMALLER than 9 characters. The Greatest of (-9,-6) is -6. The greatest ensures it cannot offset longer than the length of the string. – JulesLt jeraco toppers
Oracle INSTR - Oracle Tutorial
Nettet6. jul. 2024 · substr and instr are almost always faster/more efficient than regular expression functions.. INSTR is used to find the position of the space in the input string. … Nettet27. okt. 2024 · You can use a combination of INSTR and SUBSTR. So the algorithm would be: Get the substring of the original string (0 to half way) Find the first space at the end of the half string (going backwards) Split the original string at the point you found in 2. Nettet28. okt. 2024 · if your user name is having the combination of both characters and numeric you can try the below code select regexp_substr (email, ' [0-9A-Z] {1,10}') REG_EXP from students; Note: If you have lower case letters, this script will work and if your username has more than 10 characters please change {1,10} part of code accordingly Share Follow laman labuh aduan konten