Replace function in SQL

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I have a sample text that contains '-' or ' '. So I want a sql replace statement that replaces both '-' and ' ' with ''.

My query is:

SELECT REPLACE('SQL-Tu torial','-',' ','');

Desired outcome:

SQLTutorial

Error: I get error for Replace function arguments.

The replace function requires 3 argument(s).

Any help?

You can't use 3 parameters in a REPLACE function. Instead you can use it twice just like below :

SELECT REPLACE(REPLACE('SQL-Tu torial', '-', ''), ' ', '');

Output :

SQLTutorial

SQL Server REPLACE Function By Practical Examples, SQL Server REPLACE function overview​​ To replace all occurrences of a substring within a string with a new substring, you use the REPLACE() function as follows: REPLACE(input_string, substring, new_substring); In this syntax: input_string is any string expression to be searched. Definition and Usage. The REPLACE () function replaces all occurrences of a substring within a string, with a new substring. Note: The search is case-insensitive. Tip: Also look at the STUFF () function.

Nest two REPLACE functions.

REPLACE(REPLACE())

How to Find and Replace Text in MySQL Database using SQL , Transact-SQL reference for the REPLACE function, which replaces all occurrences of a specified string value with another string value. If string_expression is not of type varchar(max) or nvarchar(max), REPLACE truncates the return value at 8,000 bytes. To return values greater than 8,000 bytes, string_expression must be explicitly cast to a large-value data type.

You can also define a table with all the characters you want to replace and then use a single replace statement while selecting from the table:

declare @charToReplace table (char_to_replace varchar(1))
declare @tempString varchar(max) = 'SQL-Tu torial'

insert into @charToReplace values ('-'), (' ')

select @tempString = replace(@tempString, char_to_replace, '') 
from @charToReplace

select @tempString as result

Result:

SQL Server REPLACE() vs TRANSLATE(): What are the Differences , What is the difference between Translate and replace in SQL? substring is the substring to be replaced. new_substring is the replacement string. The REPLACE () function returns a new string in which all occurrences of the substring. are replaced by the new_substring. It returns NULL if any argument is NULL.

If you have more than two characters to be replaced, you can use TRANSLATE that came in 2017. Below example replaces "-", " " and "@" with "#" using TRANSLATE and then replaces "#" with "" using REPLACE. I.e., replace "-", " ", "@" and "#" with "". TRANSLATE doesn't buy you anything if you only want to substitute two characters, though.

() on the other hand, replaces each character one by one, regardless of the order of those characters. SQL provides a very helpful string function called REPLACE that allows you to replace all occurrences of a substring in a string with a new substring. The following illustrates the syntax of the REPLACE function: REPLACE (string, old_substring, new_substring);

This SQL Server tutorial explains how to use the REPLACE function in SQL Server (Transact-SQL) with syntax and examples. In SQL Server (Transact-SQL), the  REPLACE (Expression, pattern, replacement) Expression: The input string value on which the replace function has to operate. Pattern: The substring to evaluate and provides a reference position to the replacement field. REPLACEment: REPLACEs the specified string or character value of the given expression.

In this article, I'll show you how to find and replace data within strings. I will demonstrate how Duration: 3:55 Posted: Nov 27, 2018 The REPLACE function in SQL is used for replacing all occurrences of the search term in the specified string to the new given string value. For example, we have a string: “MS SQL Server 2000”

This tutorial shows you how to use a very handy string function named SQL REPLACE function to replace all occurrences of a substring with a new one. The syntax for the REPLACE function in SQL Server (Transact-SQL) is: REPLACE( string1, string_to_replace, replacement_string ) Parameters or Arguments string1 The source string from which a sequence of characters will be replaced by another set of characters. string_to_replace The string that will be searched for in string1. replacement_string

Comments
  • The documentation clearly states that replace method accepts 3 parameters, not 4....
  • Thanks, this helped me!
  • That is very cool. I didn't know Replace() would do that.