I have a question about query data with vertical format, I tried it with \g or \G . 

I referenced "4.5.1.6.2 Displaying Query Results Vertically" at <https://dev.mysql.com/doc/refman/5.5/en/mysql-tips.html>

But it not working and show error syntax at "\G"

My query : 

```
select * from mytable \G . Always wrong.

```

From that, I just want to build final query like this:

```
Select "A","B","C","D" as "ColumnName" \G

```

Expect:

```
ColumnName    
A    
B    
C    
D

```

I tried with UNION or UNION ALL. but with several thousand record, it's slow performance.

And mysql version is : Server version- 5.6.17 - MySQL Community Server (GPL)

@ Bernd Buffen

I show my query:

```
Select C.* from 

(

  (  Select * from (Select "Value1" as newcolumn UNION ALL Select "Value2" as newcolumn UNION ALL ...<200.000 UNION ALL>)   ) A

left join  

(SELECT key,column1,column2,colum3 FROM supplier ) B

on A.newcolumn = B.key 

) C

```

And handle query to database, I debug time from Begin to End, it spend from 1.30 to 2 minutes. It is not good.