sql regular expression match

Oracle's formal expression is implemented in the form of various SQL functions and a WHERE clause operator. If you are unfamiliar with regular expressions, this article will give you an idea of this new, incredibly powerful, yet seemingly mysterious

A new feature of OracleDatabase10g greatly improves your ability to search and process character data. This feature is a regular expression used to describe the text mode. It has appeared in many programming languages and a large number of UNIX

Detailed explanation of matching a single character in the regular expression tutorial, detailed explanation of the Regular Expression This document describes how to match a single character in the regular expression tutorial. We will share this

Regular Expressions (Regular Expression) provide an efficient and convenient method for string pattern matching. Almost all advanced languages provide support for regular expressions, or provide a ready-made code base for invocation. This paper

What is a regular expression? A regular expression is composed of one or more character characters and/or metacharacters. In the simplest format, a regular expression only consists of characters, such as a regular expression cat. It is read as C

The regular expression attribute in Oracle Database 10g is a powerful tool for working with text data A new feature of Oracle database 10g greatly improves your ability to search for and process character data. This feature is a formal expression,

Shell-Used regular expressions "^\d+$"//non-negative Integer (positive integer + 0)"^[0-9]*[1-9][0-9]*$"//Positive integer"^ ((-\d+) | (0+)) $ "//non-positive integer (negative integer + 0)"^-[0-9]*[1-9][0-9]*$"//Negative integer"^-?\d+$"//Integer"^

Pattern matching for MySQL WHERE clauseToday in the application of this problem encountered,There is a field T1, where the value is similar to: 1,1,1,2,3,3,4,4,5,5,2,4,3,2,1,2Need to search from inside for example: the first comma before the number

Regular expressions (RegularExpression, abbreviated as regexp, regex or regxp), also known as regular expressions, regular expressions or regular expressions, or regular expressions, it refers to a single word used to describe or match a series of

The following examples illustrate the use of regular expressions to handle problems that are common in some jobs. 1. Regexp_substr The REGEXP_SUBSTR function uses regular expressions to specify the start and end points of the return string, and to