MySQL - Select Concat an entire row

How can I select and concat every field in a row?

I want to do something similar to this:

SELECT concat(SELECT GROUP_CONCAT(COLUMN_NAME)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'tbl_name')
as single FROM 开发者_如何学运维tbl_name

..but obviously the above doesn't work. Any suggestions?

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You will have the build the query dynamically, i.e. list all columns in concat(...) explicitly. You can do that on the client side by running two queries or in a stored procedure using a prepared statement.

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You can do it in 3 steps:

1- Build field list

SELECT group_concat( column_name ) as field_list
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'TABLE_NAME'
GROUP BY table_name
LIMIT 0 , 1

2- Copy the value of field_list field

3- Extract data:

SELECT CONCAT( "Paste value copied at previous step" )
FROM TABLE_NAME

If you create a stored procedure, than you can combine the above steps