Oracle pattern matching examples

1. What is pattern matching in Oracle?
2. What is pattern matching give an example?
3. How to use REGEXP_LIKE in Oracle?
4. How to check string pattern in Oracle?

What is pattern matching in Oracle?

The LIKE conditions specify a test involving pattern matching. Whereas the equality operator (=) exactly matches one character value to another, the LIKE conditions match a portion of one character value to another by searching the first value for the pattern specified by the second.

What is pattern matching give an example?

Pattern matching is used to determine whether source files of high-level languages are syntactically correct. It is also used to find and replace a matching pattern in a text or code with another text/code. Any application that supports search functionality uses pattern matching in one way or another.

How to use REGEXP_LIKE in Oracle?

Example - Match on end

Next, let's use the REGEXP_LIKE condition to match on the end of a string. For example: SELECT last_name FROM contacts WHERE REGEXP_LIKE (last_name, '(*)n$'); This REGEXP_LIKE example will return all contacts whose last_name ends with 'n'.

How to check string pattern in Oracle?

The Oracle/PLSQL REGEXP_INSTR function is an extension of the INSTR function. It returns the location of a regular expression pattern in a string. This function, introduced in Oracle 10g, will allow you to find a substring in a string using regular expression pattern matching.