Remove the longest string containing only characters from characters (a space by default) from the start of string: ltrim('zzzyaws', 'xyz') → aws.Įxtract substring: substring ( 'John Smith', 6 ,1) → S. Returns char with every occurrence of search string replaced with a replacement string: replace ('abcdef', 'abc', '123') → 123def. You can use the following example SUBSTRING ('', '( alnum:]]+.*/)') Return all captured substrings resulting from matching a POSIX regular expression against the string: REGEXP_MATCHES ('', '( alnum:]]+.*/)') Returns expr1, left or right padded to length n characters with the sequence of characters in expr2: → substrings matching a POSIX regular expression: regexp_replace('John', '.', '1') → Jo1. Returns char, with all letters lowercase or uppercase: lower ('MR. Also, can use the (||) operators: select 'a' ||' '|| 'b' → a b. Most of SQL Server string functions are supported in PostgreSQL, there are few which aren’t:Ĭoncatenate the text representations of all the arguments: concat('a', 1) → a1. SELECT STRING_AGG(C, ',') FROM VALUES(1, 'a'), (1, 'b'), (2,'c') AS X (ID,C) GROUP BY Iįor more information, see String Functions (Transact-SQL) in the SQL Server documentation. Return a string that consists of concatenated string values in row groups. Parse a list of values with a separator and return a set of all individual elements. Replace all occurrences of a string expression with another. Return a string that consists of zero or more concatenated copies of another string expression. Use for presentation or to handle case insensitive expressions. Return a string with all characters in lower or upper case. Return a partial string from another string expression based on position and length. Convert an ASCII or UNICODE character to its ASCII or UNICODE code.Ĭonvert between ASCII or UNICODE code to a string character.įind the starting position of one string expression or string pattern within another string expression.Ĭombine multiple string input expressions into a single string with, or without, a separator character (WS).
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