In PostgreSQL, we use the SIMILAR TO operator for pattern matching within strings.It follows SQL-standard regular expressions that combine elements of LIKE, such as wildcards, with regular expression-like syntax
SQL pattern matching enables you to use _ to match any single character and % to match an arbitrary number of characters (including zero characters). In MySQL, SQL patterns are case-insensitive by default. Some examples are shown here. Do not use = or <> when you use SQL patterns. Use...
In some obscure cases it may be necessary to use the underlying operator names instead. Also see the prefix operator ^@ and corresponding starts_with function, which are useful in cases where simply matching the beginning of a string is needed. SIMILAR TO regular expressions string SIMILAR TO ...
It is similar to LIKE, but differs in that SIMILAR TO uses the regular expression understanding pattern defined by the SQL standard. Matching rules: Similar to LIKE, this operator succeeds only when its pattern matches the entire string. If you want to match a sequence in any position within...
5.3.4.7 Pattern Matching MySQL provides standard SQL pattern matching as well as a form of pattern matching based on extended regular expressions similar to those used by Unix utilities such as vi, grep, and sed. SQL pattern matching enables you to use _ to match any single character and ...
SQL pattern to identify strings that contain any of the charactersa,b, orc. Nor can you match string content based on character types such as letters or digits. For such operations, MySQL supports another type of pattern matching operation based on regular expressions and theREGEXPoperator (or...
A pattern-matching operator searches a string for a pattern specified in the conditional expression and returns true or false depend on whether it finds a match.
Use the LIKE operator for pattern matching,PolarDB:PolarDB allows you to use the traditional SQL LIKE operator to implement pattern matching. The following example shows the syntax of the LIKE operator:
The operator +: is the cons (construction) operator for sequences. Recall that methods that end with a colon (:) bind to the right, toward the Seq tail. However, +: in this case clause is actually an object named +:, so we have a nice syntax symmetry between construction of sequence...
Der Operator SIMILAR TO führt das Patternmatching unter Verwendung von regulären Ausdrücken entsprechend dem Standardformat für SQL durch. Als Metazeichen werden dabei beiden Zeichen unterstützt, die auch der Operator LIKE unterstützt. Bei SIMILAR TO erfolgt die Suche über die gesamte Zeic...