This is equivalent to the following syntax of the TRIM() function: TRIM(LEADING character FROM string) - LTRIM(string,character) The syntax of LTRIM() and RTRIM() function are as follows: LTRIM(string, ) īTRIM(string, ) Code language: SQL (Structured Query Language) ( sql ) The BTRIM function is the combination of the LTRIM() and RTRIM() functions.The RTRIM() function removes all characters, spaces by default, from the end of a string.The LTRIM() function removes all characters, spaces by default, from the beginning of a string.PostgreSQL provides you with LTRIM, RTRIM() and BTRIM functions that are the shorter version of the TRIM() function. ) - 9100 Code language: SQL (Structured Query Language) ( sql ) PostgreSQL LTRIM, RTRIM, and BTRIM functions Because the TRIM() function only accepts a string as the argument, we have to use type cast to convert the number into a string before passing it to the TRIM() function. The following statement removes leading zero (0) from a number. Last_name = TRIM (last_name) Code language: SQL (Structured Query Language) ( sql ) It uses the TRIM() function to remove both leading and trailing spaces from the first_name and last_name columns. The following statement updates the first_name and last_name columns of the customer table in the sample database with the values that do not have leading and trailing spaces. SELECT TRIM (Ĭode language: SQL (Structured Query Language) ( sql ) See the following examples of removing leading, trailing, and both leading and trailing spaces from strings. Or just simply: TRIM(string) Code language: SQL (Structured Query Language) ( sql ) PostgreSQL TRIM function examples TRIM(TRAILING FROM string) Code language: SQL (Structured Query Language) ( sql )Īnd to remove all spaces at the beginning and ending of a string, you use the following syntax: TRIM(BOTH FROM string) Code language: SQL (Structured Query Language) ( sql ) The following syntax of the TRIM() function removes all spaces from the end of a string. TRIM( FROM string) Code language: SQL (Structured Query Language) ( sql )įor example, if you want to remove spaces from the beginning of a string, you use the following syntax: TRIM(LEADING FROM string) Code language: SQL (Structured Query Language) ( sql ) The following illustrates the syntax of the TRIM() function. The TRIM() function is very useful when we want to remove the unwanted characters from a string in the database. Note that a string can be any of the following data types: char, varchar, and text. With the TRIM() function, you can remove the longest string containing a character from the start, end, or both the start and end of a string. By default, the TRIM() function remove spaces (‘ ‘) if you don’t specify explicitly which character that you want to remove. The TRIM() function removes the longest string that contains a specific character from a string. Summary: in this tutorial, you will learn how to use PostgreSQL TRIM() function to remove the longest string that contains spaces or a particular character from a string.
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