![]() ![]() 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. ) Code language: SQL (Structured Query Language) ( sql ) 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 ) Using CONCAT SELECT CONCAT ( 'Happy ', 'Birthday ', 11, '/', '25' ) AS Result ī.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. For older linked servers, the CONCAT operation will happen locally, after the linked server returns the non-concatenated values. The CONCAT function can be executed remotely on a linked server of version SQL Server 2012 (11.x) and above. This truncation preserves space and supports plan generation efficiency. If none of the input arguments has a supported large object (LOB) type, then the return type truncates to 8000 characters in length, regardless of the return type. Therefore, a concatenation of two integers returns a result with a length of no less than 24. For example, an int (14) has a string length of 12, while a float has a length of 32. Other data types have different lengths when implicitly converted to strings. When CONCAT receives nvarchar input arguments of length <= 4000 characters, or varchar input arguments of length <= 8000 characters, implicit conversions can affect the length of the result. In that case, CONCAT returns a result of type nvarchar(max). Varchar(<= 8000) (a varchar of at most 8000 characters) unless one of the parameters is an nvarchar of any length. Otherwise, any argument of type nvarchar of at most 4000 characters In this case, CONCAT returns a result of type nvarchar(max).ģ. Varchar(max), unless one of the parameters is an nvarchar of any length. This table illustrates the mapping: Input type ![]() The return type depends on the type of the arguments. See CAST and CONVERT (Transact-SQL) for more information about data type conversions. ![]() The implicit conversion to strings follows the existing rules for data type conversions. If CONCAT receives arguments with all NULL values, it will return an empty string of type varchar(1). CONCAT implicitly converts null values to empty strings. CONCAT implicitly converts all arguments to string types before concatenation. It requires a minimum of two input values otherwise, CONCAT will raise an error. RemarksĬONCAT takes a variable number of string arguments and concatenates (or joins) them into a single string. Return typesĪ string value whose length and type depend on the input. The CONCAT function requires at least two string_value arguments, and no more than 254 string_value arguments. ArgumentsĪ string value to concatenate to the other values. To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. ![]()
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