How To Use Comma In Sql Query

This means you can have your result set appear as a comma separated list a space separated list or whatever separator you choose to use.

How to use comma in sql query. The problem with using substring is that we only must pass a fixed length that specifies how many characters of the expression will be returned. Rtrim str repeat sizeof arr. A typical example of this is when a column can store multiple values separated by a comma. Create function dbo fn formatwithcommas. Commas in t sql are used to format numbers as list separators and value separators.

For example if you have following resultset and if you want each of the value of the comma separated string from the last column in a separate row previously you had to use a very complicated function on the column which was a performance killer. In this article we have demonstrated how to build a comma delimited list of column values using a set based sql query. This can slow the performance of your queries. Another common method is. Starting with sql server 2017 you can now make your query results appear as a list.

Valued elements then joins them into a string using commas as glue. Xiaoy312 s suggestion is one of the common methods used to generate comma separated placeholder strings. B using string split function to split a comma separated string in a column. Add the parameters for the function here. Sometimes database tables are not normalized.

Below are the two functions. First function will add the comma after 3 digits from right and the second function will add comma after two two digits from the 3rd digit onward from the right. For example in this query you can see where i have a single quote that is delimiting the beginning and end here of a text which is a comma and space. Stuff deletes a specified length of characters from the given string and inserts another set of characters at a specified starting point. Put commas at the end of a line not the start.

It generates an array containing. When commas are used as separators there is no specific rule for placing commas at the end of a line or at the beginning. Formatting commas in t sql. The string split can help normalize the data by splitting these multi valued columns. While it s true that you could achieve this same effect prior to sql server 2017 it was a bit fiddly.