![]() The result will be a table with two columns: department and the concatenated string of employee names. ![]() This query will concatenate the names of employees in each department, separated by a comma and a space. Here is an example: SELECT department, GROUP_CONCAT(employee_name SEPARATOR ', ') The GROUP_CONCAT() function in MySQL is used to concatenate strings from multiple rows into a single string separated by a specified separator. This query would return a single string that contains all student names, separated by a comma. separator (optional) – a separator string to separate concatenated values, default is ‘,’.Įxample: SELECT GROUP_CONCAT(student_name).expression – an expression to be evaluated and concatenated.DISTINCT (optional) – specifies that only unique values should be concatenated.In this tutorial, you have learned how to use MySQL CONCAT and CONCAT_WS functions to concatenate one or more string value into a single string.Syntax: GROUP_CONCAT( expression ) Code language: SQL (Structured Query Language) ( sql ) Here is the output result: Customer_Address The following statement constructs complete addresses using the CONCAT_WS function: SELECT CONCAT_WS( CHAR( 13),ĬONCAT_WS( ' ', contactLastname, contactFirstname),ĬONCAT_WS( CHAR( 13), '')) AS Customer_Address SELECT CONCAT_WS( ',', 'Jonathan', 'Smith', NULL) Code language: SQL (Structured Query Language) ( sql ) Unlike the CONCAT function, the CONCAT_WS function skips NULL values after the separator argument. See the following example: SELECT CONCAT_WS( NULL, 'Jonathan', 'Smith') Code language: SQL (Structured Query Language) ( sql ) The CONCAT_WS function returns NULL if and only if the first argument, which is the separator, is NULL. The following statement concatenates two string values: John and Doe, and separates these two strings by a comma: SELECT CONCAT_WS( ',', 'John', 'Doe') Code language: SQL (Structured Query Language) ( sql ) The CONCAT_WS function adds the separator between string arguments and returns a single string with the separator inserted between string arguments. The first argument is the separator for other arguments: string1, string2, … ) Code language: SQL (Structured Query Language) ( sql ) The following illustrates the syntax of the CONCAT_WS function: CONCAT_WS(seperator,string1,string2. The CONCAT_WS function concatenates two or more string values with a predefined separator. MySQL provides a special form of the CONCAT function: CONCAT_WS function. Try It Out MySQL CONCAT_WS function: Concatenate strings with a separator To get the full names of contacts, you use the CONCAT function to concatenate first name, space, last name as the following statement: SELECT concat(contactFirstName, ' ',contactLastName) FullnameĬustomers Code language: SQL (Structured Query Language) ( sql ) See the following customers table in the sample database. If you add a NULL value, the CONCAT function returns a NULL value as follows: SELECT CONCAT( 'MySQL', NULL, 'CONCAT') Code language: SQL (Structured Query Language) ( sql ) SELECT CONCAT( 'MySQL', 'CONCAT') Code language: SQL (Structured Query Language) ( sql ) The following statement concatenates two quoted strings: MySQL and CONCAT. ![]() If any argument is NULL, the CONCAT function returns a NULL value. The CONCAT function converts all arguments to the string type before concatenating. The following illustrates the syntax of the CONCAT function. The CONCAT function requires a minimum of one parameter otherwise it raises an error. The MySQL CONCAT function takes one or more string arguments and concatenates them into a single string. In Microsoft SQL server, you use the addition arithmetic operator (+) to concatenate string values.īesides using spaces for string concatenation, MySQL provides two other functions that concatenate string values: CONCAT and CONCAT_WS. ![]() For example, if you use PostgreSQL or Oracle, you have to use the string concatenation operator ||. MySQL string concatenation is cleaner in comparison with other database management systems. ![]() To concatenate two or more quoted string values, you place the string next to each other as the following syntax: SELECT 'MySQL ' 'String ' 'Concatenation' Code language: SQL (Structured Query Language) ( sql ) Summary: in this tutorial, you will learn various ways to concatenate two or more strings together by using the MySQL CONCAT and CONCAT_WS functions. ![]()
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