#Mysql concatenate strings plus

When you work with strings with a null value, the result of the concatenation depends on the session settings. Concatenating a zero-length string always concatenates the two specified strings. A zero-length binary string can be specified as 0x without any byte values specified in the hexadecimal constant. A zero-length character string can be specified as two single quotation marks without any characters inside the quotation marks. The + (String Concatenation) operator behaves differently when it works with an empty, zero-length string than when it works with NULL, or unknown values. For more information, see Data Type Precedence (Transact-SQL). Returns the data type of the argument with the highest precedence. + CONVERT(VARCHAR(5), Here is the same conversion using CAST.

#Mysql concatenate strings plus

concatenates two binary strings plus a space. SELECT + A CONVERT or CAST function is required because this example No CONVERT or CAST function is required because this example The following example shows when CONVERT, or CAST, must be used with binary concatenation and when CONVERT, or CAST, does not have to be used.

Both expressions must be of the same data type, or one expression must be able to be implicitly converted to the data type of the other expression.Īn explicit conversion to character data must be used when concatenating binary strings and any characters between the binary strings. Is any valid expression of any one of the data types in the character and binary data type category, except the image, ntext, or text data types. The above example won’t work in SQL Server.To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.

Note that in MySQL, you will need to enable the pipe concatenation operator first. If you’re using SQLite, this is your only option.

Most RDBMSs include a string concatenation operator that concatenates its operands. SQLite and Oracle don’t have a CONCAT_WS() function, but they do have a string concatenation operator (see below). RDBMSs that have a CONCAT_WS() function include MySQL, MariaDB, SQL Server, and PostgreSQL. In such cases, you only need to specify the separator once. This function can be particularly useful if you have a lot of strings to concatenate: SELECT CONCAT_WS(', ', 'Red', 'Green', 'Orange', 'Blue') This function allows you to specify a separator that will be used to separate all concatenated strings.Įxample: SELECT CONCAT_WS(' ', 'Bangkok', 'Breaking')

The CONCAT_WS() FunctionĪnother way to include a space between the strings is to use the CONCAT_WS() function. SQLite doesn’t include a CONCAT() function, but it does have a string concatenation operator (see below). RDBMSs that have a CONCAT() function include MySQL, MariaDB, SQL Server, Oracle, and PostgreSQL. With this function, if we want to include a space between the strings, we’d need to either add a space to one of the strings, or include a space as a separate argument: SELECTĬONCAT('Bangkok ', 'Breaking') AS 'Option 1',ĬONCAT('Bangkok', ' ', 'Breaking') AS 'Option 2' Generally, non-string arguments are converted to a string before the concatenation occurs.Įxample: SELECT CONCAT('Bangkok', 'Breaking') Most major RDBMSs provide a CONCAT() function for concatenating its string arguments. And there’s also a string concatenation operator, which allows us to concatenate its operands.īelow are examples of each method.There’s also a CONCAT_WS() that allows you to specify a separator that separates the concatenated strings.There’s the CONCAT() function, which concatenates its arguments.Most of the major RDBMSs provide several options for concatenating two or more strings.