g stands for global If g flag is used, the function replaces all occurrences of substrings that match the pattern. For example, i means case-insensitive matching or ignore case. flags contains zero or more single-letter flag that controls the behavior of the REGEX_REPLACE() function.next_text is the text that replaces the substrings.It could be any patterns, for example: email, URL, phone number, etc. If no match found, the source is unchanged. source is the string that you will look for substrings that match the pattern and replace it with the new_text.The REGEXP_REPLACE() function accepts four parameters: REGEXP_REPLACE(source, pattern, new_text ) Code language: SQL (Structured Query Language) ( sql ) The following illustrates the syntax of the REGEX_REPLACE() function. The REGEXP_REPLACE() function allows you to replace substrings that match a regular expression. In case you need a more advanced matching, you can use the REGEXP_REPLACE() function. SELECTĬustomer Code language: SQL (Structured Query Language) ( sql ) PostgreSQL REGEXP_REPLACE function Let’s verify if the replacements have taken place. Now, suppose you want to update the email column to replace the domain with, you use the following statement: UPDATEīecause we omitted the WHERE clause, all rows in the customer table were updated. Let’s use the customer table in the sample database for the demonstration: SELECTĬustomer Code language: SQL (Structured Query Language) ( sql ) If you want to search and replace a substring in a table column, you use the following syntax: UPDATEĬolumn_name = REPLACE( column,old_text,new_text)Ĭondition Code language: SQL (Structured Query Language) ( sql ) ) Code language: SQL (Structured Query Language) ( sql ) The following example replaces the substring tt with xx in a URL: SELECT REPLACE ( In this example, we replaced all characters ‘A’ with the character ‘Z’ in a string. See the following example of using the REPLACE()function: SELECT REPLACE ( 'ABC AA', 'A', 'Z') Code language: SQL (Structured Query Language) ( sql ) new_text is the new text that will replace the old text ( old_text).If the old_text appears multiple times in the string, all of its occurrences will be replaced.
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