![]() ![]() This example will return 'AndGrsGn' because it is searching for the first vowel (a, e, i, o, or u) in the string. The | pattern is used like an "OR" to specify more than one alternative.įor example: SELECT REGEXP_REPLACE ('Anderson', 'a|e|i|o|u', 'G') The next example that we will look at involves using the | pattern. In this example, we are going to replace all two-digit values from the address field in the contacts table with the value 'TBD'.Įxample - Match on more than one alternative Now, let's look how we would use the REGEXP_REPLACE function with a table column to replace two digit numbers.įor example: SELECT REGEXP_REPLACE (address, '(\d)(\d)', 'TBD') In this case, it will skip over the 2 and 5 numeric values and replace 10 with a # character. This example will replace a number that has two digits side-by-side as specified by (\d)(\d). ![]() Result: '2, 5, and # are numbers in this example' We could change our pattern to search for only two-digit numbers.įor example: SELECT REGEXP_REPLACE ('2, 5, and 10 are numbers in this example', '(\d)(\d)', '#') It will replace the occurrences with a # character. This example will replace all numeric digits in the string as specified by \d. Result: '#, #, and # are numbers in this example' Let's look next at how we would use the REGEXP_REPLACE function to match on a single digit character pattern.įor example: SELECT REGEXP_REPLACE ('2, 5, and 10 are numbers in this example', '\d', '#') By default, whitespace characters are matched like any other character. ![]() By default, expression is assumed to be a single line. By default, the period is a wildcard.Įxpression is assumed to have multiple lines, where ^ is the start of a line and $ is the end of a line, regardless of the position of those characters in expression. It can be a combination of the following: ValueĪllows the period character (.) to match the newline character. It allows you to modify the matching behavior for the REGEXP_REPLACE function. If you specify 0 for this parameter, all appearances of pattern will be replaced in string. If omitted, it defaults to 1 which is the first appearance of pattern in string. It is the nth appearance of pattern in string. If omitted, it defaults to 1 which is the first position in the string. It is the position in string where the search will start. If the replacement_string parameter is omitted, the function simply removes all matched patterns, and returns the resulting string. Matched patterns will be replaced with replacement_string in string. Matches the preceding pattern at least n times, but not more than m times. Matches the preceding pattern at least n times. Matches the preceding pattern zero or one occurrence. Matches the preceding pattern one or more occurrences. Matches the preceding pattern zero or more occurrences. Matches the beginning of a string or matches at the end of a string before a newline character. Matches one collation element that can be more than one character. Matches the nth subexpression found within ( ) before encountering \n. Matches at least m times, but no more than n times. Used to group expressions as a subexpression. Used to specify a nonmatching list where you are trying to match any character except for the ones in the list. Used to specify a matching list where you are trying to match any one of the characters in the list. Used like an "OR" to specify more than one alternative. If used with a match_parameter of 'm', it matches the end of a line anywhere within expression. If used with a match_parameter of 'm', it matches the start of a line anywhere within expression. It can be a combination of the following: Value The regular expression matching information. ![]() It can be CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The syntax for the REGEXP_REPLACE function in Oracle is: REGEXP_REPLACE( string, pattern ] ] ] ) Parameters or Arguments string The string to search. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |