Regular Expressions Reference - Basic Syntax The regular expressions reference on this website functions both as a reference to all available regex syntax and as a comparison of the features supported by the regular expression flavors discussed in the tutorial. The reference tables pack an incredible amount of information. To get the most out of them, follow this legend to learn how to read them. The tables have six columns for each regular expression feature. The final two columns indicate whether your two chosen regular expression flavors support this particular feature. When this legend says "all versions" or "no version", that means all or none of the versions of each flavor that are covered by the reference tables: For the .NET flavor, some features are indicated with "ECMA" or "non-ECMA". For the std::regex and boost::regex flavor there are additional indicators ECMA, basic, extended, grep, egrep, and awk. For the PCRE2 flavor, some replacement string features are indicated with "extended".
Supported SQL Syntax and Functions Supported SQL Statements With a few exceptions, the gateway provides full support for Oracle DELETE, INSERT, SELECT, and UPDATE statements. The gateway does not support Oracle data definition language (DDL) statements. No form of the Oracle ALTER, CREATE, DROP, GRANT, or TRUNCATE statements can be used. Note: TRUNCATE cannot be used in a pass-through statement. The DELETE statement is fully supported. The INSERT statement is fully supported. The SELECT statement is fully supported, with these exceptions: CONNECT BY conditionNOWAITSTART WITH conditionWHERE CURRENT OF The UPDATE statement is fully supported. Oracle Functions All functions are evaluated by the SQL Server database after the gateway has converted them to SQL Server SQL equivalents. Functions Not Supported by SQL Server Oracle SQL functions with no equivalent function in SQL Server are not supported in DELETE, INSERT, or UPDATE statements, but are evaluated by the Oracle database if the statement is a SELECT statement. Where:
8 Regular Expressions You Should Know Regular expressions are a language of their own. When you learn a new programming language, they're this little sub-language that makes no sense at first glance. Many times you have to read another tutorial, article, or book just to understand the "simple" pattern described. Today, we'll review eight regular expressions that you should know for your next coding project. Before we start, you might want to check out some of the regex apps on Envato Market, such as: You can extract emails, proxies, IPs, phone numbers, addresses, HTML tags, URLs, links, dates, etc. Extract, scrape, parse, harvest. Extract emails from an old CSV address book.Extract image sources from HTML files.Extract proxies from online websites.Extract URL results from Google.Fast regex testerAJAX-basedjQuery etc are not required.No database requiredAdvertisement ready This item is a PHP RegEx builder, which helps you to build Regular Expressions in an extensible PHP syntax. All that in a PHP syntax. my-us3r_n4m3 myp4ssw0rd
Online regex tester and debugger: JavaScript, Python, PHP, and PCRE regular expressions 101 — an online regex tester for javascript, php, pcre and python. @regex101 email me recommend on g+ donate flattr <div class="errorbar"><p>It seems you have javascript disabled or your browser does not support it. Javascript is a requirement for this website to work; it is virtually useless without it. I suggest you visit: <a href=" If this is your first time visiting Regex101.com it is highly recommend to take the tour by clicking here. Debug Replace whitespace colorize regex Code sample Permalink Community Clear Please insert an expression in the box above. Welcome to Regex101.com. I've added some extra space at the bottom of the page so that you can scroll freely with the quickref detached without it obstructing your view. Regular Expressions quick reference Basic | Complete Reference | Tips & tricks Detatch Quick filter: How do I match several test cases? close Method: PermaID: * Regex: