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#MYSQL CONCAT A MINIMUM HOW TO#
#MYSQL CONCAT A MINIMUM CODE#

As you can see in the output, the results are the same as before, but the column is now named vend_title and any client application can refer to this column by name, just as it would to any actual table column.Īliases have other uses, too. This instructs SQL to create a calculated field named vend_title containing the results of the specified calculation.

#MYSQL CONCAT A MINIMUM CODE#

The SELECT statement itself is the same as the one used in the previous code snippet, except that here the calculated field is followed by the text AS vend_title. Take a look at the following SELECT statement: SELECT Concat(RTrim(vend_name), ' (', RTrim(vend_country), ')') AS Aliases are assigned with the AS keyword. An alias is just that, an alternative name for a field or value. To solve this problem, SQL supports column aliases. Although this can be fine if you are just looking at the results in a SQL query tool, an unnamed column cannot be used within a client application because the client has no way to refer to that column. But what is the name of this new calculated column? Well, the truth is, it has no name it is simply a value. The SELECT statement used to concatenate the address field works well, as seen in the previous output. The trim() Functions In addition to RTrim() (which, as just seen, trims the right side of a string), MySQL supports the use of LTrim() (which trims the left side of a string), and trim() (which trims both the right and left). By using RTrim(), the individual columns are all trimmed properly. The RTrim() function trims all spaces from the right of a value. This can be done using the MySQL RTrim() function, as follows: SELECT Concat(RTrim(vend_name), ' (', RTrim(vend_country), ')')

Ī string containing the close parenthesisĪs you can see in the output shown previously, the SELECT statement returns a single column (a calculated field) containing all four of these elements as one unit.īack in previous pages "filter data" I mentioned the need to trim data so as to remove any trailing spaces.

The state stored in the vend_country column The previous SELECT statements concatenate four elements:Ī string containing a space and an open parenthesis Concat() requires one or more values to be specified, each separated by commas. | Concat(vend_name, ' (', vend_country, ')') |Ĭoncat() concatenates strings, appending them to each other to create one bigger string. SELECT Concat(vend_name, ' (', vend_country, ')') Keep this in mind when converting SQL statements to MySQL. MySQL Is Different Most DBMSs use operators + or || for concatenation MySQL uses the Concat() function. In MySQL SELECT statements, you can concatenate columns using the Concat() function. The solution is to concatenate the two columns. The SELECT statement that returns the vendor names and locations is simple enough, but how would you create this combined value? In addition, you need to surround vend_country with parenthesis, and those are definitely not stored in the database table. The report wants a single value, and the data in the table is stored in two columns: vend_name and vend_country.

Imagine you are generating a vendor report and need to list the vendor location as part of the vendor name in the format name (location). The following is the output.The vendors table contains vendor name and address information. mysql> select concat(StudentId,' as an Id'),concat(StudentName,' as a Name') from selectConcat +-+-+-+Ĭontact the field in select statement. The query is as follows − mysql> select *from selectConcat Mysql> insert into selectConcat values(5,'Sam',22) ĭisplay all records from the table using select statement. Mysql> insert into selectConcat values(4,'Bob',21) Mysql> insert into selectConcat values(3,'Adam',25) Mysql> insert into selectConcat values(2,'John',24) The query is as follows − mysql> insert into selectConcat values(1,'Carol',23) Insert some records in the table using insert command.

#MYSQL CONCAT A MINIMUM HOW TO#

In this article, we will look into the MySQL CONCAT () syntax, demonstrate to you how to use it, and explore the differences between CONCAT and CONCATWS. The query to create a table is as follows. 4976 The MySQL CONCAT function is widely used to concatenate multiple column values into a single column. To understand the above syntax, let us first create a table. OncatenationString’).N from yourTableName SELECT CONCAT(yourColumnName1,’an圜oncatenationString’),CONCAT(yourColumnName2,’an圜 To concat a field in MySQL SELECT, use the CONCAT() function as shown in the below syntax.